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{{Eldritch Abomination}}s in FanFiction.

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[[AC: ''Literature/ASongOfIceAndFire'']]
* ''FanFic/PurpleDays'': [[ZombieApocalypse The Long Night and the White Walkers]]. [[GroundhogPeggySue The Purple]] as well. The monstrosity in Stygai, whatever it is, also qualifies as this. Joffrey and Sansa consider that they ''themselves'' are turning into this in late loops.

[[AC: ''WesternAnimation/AvatarTheLastAirbender'']]
* ''FanFic/TheWorldWithoutTheWar'' has [[spoiler: the Four Elemental Beasts, who were created by the World Spirit before it took notice of humanity's existence. Their "logic" is similar to that of the Avatar, and when the Phoenix, the Beast of Fire, [[SealedEvilInACan escapes]], the other three Beasts will awaken, they would destroy civilization. Because that's the only way they can communicate with humans]].
* In the AlternateUniverseFic ''FanFic/{{Embers}}'', quite a few of the more dangerous spirits are either this or an AnimalisticAbomination.

[[AC: ''Manga/{{Bleach}}'']]
* ''FanFic/HammeredDown'' portrays the Vasto Lorde-class Espada as AnthropomorphicPersonification(s).

[[AC: ''WesternAnimation/CodenameKidsNextDoor'']]
* Invoked/parodied in ''[[http://www.fanfiction.net/s/4657412/1/Operation_There_Is_No_Operation Operation: There Is No Operation]]'' where we meet the Galactic Kids Next Door, some of which are eldritch abominations with unpronounceable names. Since they are minors, they only induce temporary insanity in other species who see them and only with specific intervals, so as long as you remember to blink at the right time, you are fine. [[MarsNeedsWomen Oh, and one of them wants to date Nigel Uno.]]

[[AC: CrossOver]]
* ''Fanfic/LostTalesOfFantasia'' has the inhabitants of [[WesternAnimation/AliceInWonderland Wonderland]], which are described as demonic creatures of nightmares. Wonderland itself is an EldritchLocation that is said to be {{Hell}}. The two beings we see that come from it, [[AdaptationalVillainy Alice]] and [[WesternAnimation/TheAdventuresOfIchabodAndMrToad the Headless Horseman]], are definitely [[HumanoidAbomination Humanoid Abominations]]. [[WesternAnimation/{{Fantasia}} Chernabog]] is also hinted at.
* ''Fanfic/ChildrenOfAnElderGod'' mixes ''Anime/NeonGenesisEvangelion'' with the Franchise/CthulhuMythos. The Children have to fight the Elder Gods and the Great Old Ones, and every time they kill one of them, they absorb their power. At the end, [[spoiler: Shinji, Asuka and their teammates have become Eldritch Abominations and leave human society forever because everyone is frightened of them.]]
* ''Fanfic/ChildOfTheStorm'' mentions the Outsiders from ''Literature/TheDresdenFiles''. It also has the Elder God of Chaos and Black Magic Chthon, who spends most of the book masterminding his return through the Darkhold, ''the'' TomeOfEldritchLore, described as being indestructible and 'a brother to entropy'. His mere voice makes reality scream and when he finally succeeds, the presence of a mere ''fragment'' of him on the mortal plane starts twisting reality inside-out, and if he emerges in full, he'll destroy the universe.
** The N'Garai and the Mabdhara, Chthon's heralds and their generals, qualify as a smaller scale version of this, with the latter being able to manipulate chaos to disperse pretty much any magical attack thrown at them, to the point where one feels comfortable ignoring Wanda Maximoff of all people. [[ColonyDrop She makes it regret that decision.]]
** Dormammu, Surtur, Shuma-Gorath, and Lucifer all qualify, being mentioned as problems that Doctor Strange has to deal with.
** The Endless qualify as a fairly benevolent (mostly) version of this; however, it must not be forgotten that these are indescribably ancient beings that date back to the very beginning of the universe, or may even predate it entirely, that appear differently to every single separate observer, can do with reality pretty much what they please, and operate on an entirely different moral framework even to gods, let alone mortals.
** The Phoenix a.k.a. Destruction is a particular example: on the physical plane, She has no specific form, unlike Her siblings, taking hosts, restoring or destroying worlds, making such decisions on an incomprehensible logic, being explicitly described by Loki as more of a force of nature than anything else. Loki describes Her as a being without any concept of collateral damage, restraint, or middle gears in general, taking hosts as a MoralityChain. Oh, and she can play with reality with consummate ease - when possessing [[spoiler: Harry]], instead of simply standing up, She rearranges reality so that he's stood up, [[NotSoDifferent in the exact same way that Chthon does several chapters later.]] Even a small fragment of her power isn't meant to touch the world in one place for very long, for fear of burning a hole in the universe and providing a beacon for yet more examples of this trope. More to the point, She's even more powerful than he is; when the Darkhold - semi-sentient utterly indestructible ultimate TomeOfEldritchLore - senses a mere ''whisper'' of her power, it starts literally trembling in fear.
*** And that's when she's in one of Her benevolent/justifiably outraged moods (what with [[spoiler: having merged with Lily Potter, Harry's mother]]). The Dark Phoenix is described as all that amoral volatility combined with human darkness, and is ''even worse'', something that Doctor Strange, who fights examples of this trope for a living, describes as 'a horror beyond words'.
*** This description is entirely justified, since the last Dark Phoenix, [[spoiler: Surtur]], destroyed ''an entire galaxy'' before it was stopped, also creating the Great Dragons (think Smaug, but worse), transforming defectors into its seven 'Great Captains', each of which is ''at least'' a PhysicalGod and an example in their own right (one of them is Jormungand, father of dragons, who even when relatively weak, was only beaten when Thor ''threw him into a neutron star''), transforming the spirits of its dead enemies into PersonOfMassDestruction scale minions, getting more powerful whenever it was fought... And even when it was defeated, even then, it was impossible to kill, so the Alliance against it had to empower a Skyfather level champion with a specially enchanted blade made of Uru and Vibranium, ''specifically designed'' to NoSell its Phoenix fire, ''just to distract it for long enough for them to seal it away.'' And ''even then'', they could [[SealedEvilInACan only imprison it for a million years]] in a cosmic scale multi-dimensional magical prison that encompasses entire worlds [[spoiler: (it's Yggdrasil)]], which simultaneously keeps it locked away, siphons off its power to strengthen the prison/empower the Warden, and which ''still'' occasionally becomes a LeakingCanOfEvil.
* ''Fanfic/LastChildOfKrypton'': This story includes eldritch beings of both universes: the Angels (giant alien beings who display a myriad of shapes and defy the laws of physics) and [[spoiler:the New Gods. Most prominently, evil god Darkseid.]]
* ''Fanfic/SOE2LoneHeirOfKrypton'': Asuka fights humongous alien monsters known as Angels, and during an arc story she also faces [[spoiler:the New Gods of Apokolips.]]
* ''Fanfic/ThousandShinji'' mixes ''Anime/NeonGenesisEvangelion'' with ''TabletopGame/{{Warhammer 40000}}''. The Children become worshippers of the Chaos Gods and they slowly beging to change until [[spoiler:they ascend and become the New Chaos Gods.]] At the very least they are more benevolent than their predecesors.
* In ''Series/BuffyTheVampireSlayer''/''ComicBook/{{Supergirl}}'' crossover ''Fanfic/TheVampireOfSteel'', M'Nagaleh, a cosmic horror summoned by a mob of vampires checks most of Lovecraftian traits: Completely alien thought processes? Check. Humongous? Check. Gelatinous? Check. Terrifyingly powerful? Check. Tentacles? Double check. It's even called "a glob of whatever-it-was".
-->An aperture was opening in the very air above them, and something was tumbling out. Something glistening, gelatinous, tentacled, eyed, and alive. It settled around the towers, but there was more of it coming out.
* ''[[http://www.fanfiction.net/s/6260492/1/Happy_Families_Are_All_Alike Happy Families Are All Alike]]'' has mentioned unliving beings from beyond the veil of death (which Orochimaru apparently enjoys killing) and the Kyuubi has displayed unnerving powers, which in the 7th chapter escalated to full-on mind-shattering EldritchAbomination status.
* ''FanFic/PersonalityConflicts'' depicts [[EnemyWithin the Green Ranger]] and Nyghtmayr as this.
* In the ''WesternAnimation/MyLittlePonyFriendshipIsMagic''/''Series/DoctorWho'' crossover ''FanFic/TimeLordsAndTerror'', The Smooze, the infamous BlobMonster from the [[WesternAnimation/MyLittlePonyTheMovie1986 G1 theatrical movie]], is re-imagined as the S’Müz, an [[OmnicidalManiac omnicidal]] cloud of [[EnergyBeings psychokinetic energy]] whose voice alone is enough to incapacitate mortals with its innate hideousness, and who will be satisfied with nothing short of absorbing all the psychokinetic energy (AKA 'life energy') in not just the universe, but the ''multiverse''. This thing is essentially an actively malevolent ApocalypseHow/ClassZ Event! The only way the non-Time Lord protagonists are able to withstand ''seeing'' the monstrosity with sanity intact is with the help of [[ReversePolarity inverted perception filters]]. It doesn't help that the author can convincingly write in the CosmicHorrorStory style, with in-depth descriptions of the alien and often contradictory aspects of the abomination, nor that it was deliberately written to channel [[VideoGame/MassEffect1 Sovereign]].
* The ''Manga/RanmaOneHalf''/''Anime/SailorMoon'' fic ''FanFic/TheDarkLordsOfNerima'' has something called Unit Zero. We know next to nothing about it, except that it has enormous power and if given the chance, will attack Sailor Moon via some unknown means. [[spoiler:Subverted, Unit Zero is actually a clone of Sailor Moon. The sensed power is that of Serenity's bloodline, and the emptiness is due to the girl's lack of a Star Seed. The only cure for that is to rip out the original's Star Seed and put it in herself, which, thanks to Unit Zero's conditioning, will leave the power of the Silver Crystal in the hands of the antagonists. Whatever the case, she isn't even a HumanoidAbomination, and is most certainly a WoobieDestroyerOfWorlds.]]
** A more straight example comes in the form of the Nameless One, a malevolent entity that was sealed away by previous generations of Senshi, but can still manifest its power through use of minions that heed its call. It has enough power to break Sailor Moon's seal on the Dark Kingdom, [[spoiler: and when it manages to open enough of a rift to attack directly, it takes Sailor Chibi-Moon, the rest of the Sailor Senshi, sans Saturn, the power of Helios and his sister Melinoe and power of all the dreams and nightmares of the human race channeled through the Golden Crystal to drive it back and seal the rift]].
* In ''Fanfic/RyuugisTheMasterOfDeath'', Literature/HarryPotter and his companion both appear as Eldritch Abominations when they appear in [[Literature/TheDresdenFiles the Dresden universe]] because according to his companion, the universe requires they leave behind their Shapes and borrow new ones from [[EldritchLocation a place where nothing exists]] until they leave. In his words, "There's quite a lot that doesn't exist. We didn't exist until a moment ago." As a result, to Dresden, most of his encounters with Harry are distinctly unnerving, because he thinks (and is technically right) that this twinkly eyed old man is one of the most terrifying entities ever to cross the boundaries of reality. The facts that parts of Harry's magic are ''literally impossible'' by Dresden Files standards, and that he usually appears through a gigantic train that seems to happily park in midair, doesn't help. Then Dresden winds up ''literally'' [[DidWeJustHaveTeaWithCthulhu having tea with Cthulhu.]]
* Computer viruses and malware manifest as such in ''FanFic/TheInfiniteLoops''. There's also the Hackers, which are inspired by Lovecraft. And then there's the viral composite consciousness that caused The Crash, an event which resulted in the total RetGone of a universe.
* The supercrossover military fanfiction ''FanFic/TheTerminatorsArmyOfLegend'' features Archdemon Deitus the Lifehunter, the fallen, immortal son of fallen Archangels Messorem and Vitam, the literal incarnations of Death and Life respectively. The Lifehunter has many forms he can take, including projecting himself and his image to others, through dreams or a waking state, and he wields unimaginable power, even while bound to his throne in Purgatory through the mystical and incomprehensible ''Chains of Eternity''. One of his favorite past times is tormenting mortals, angels, and demons alike, and he's strongly hinted to be the [[TheManBehindTheMan puppet master]] throughout the entire series. Even the common form he takes (and may be his true form if the appearance of his young son is any indicator) is that of a massive satyr with slick, oily-black tentacles sprouting from his body which he uses to ''sap the life force from his victims to feed his own immortality'', turning them into grisly, dehydrated husks in the process, thus granting him his nickname.
* [[WesternAnimation/MyLittlePonyFriendshipIsMagic My Littly Pony]]/VideoGame/{{Minecraft}} Crossover, ''FanFic/MyLittleMinecraftAtTheEnd'' gives us several examples. In order of increasing power and nastiness, they are:
** [[spoiler:[[HumanoidAbomination The Miner himself]]]]. He resembles nothing that the ponies have ever seen before, and his powers defy all the laws of nature as they understand them. They even speculate that he has to physically override the laws of nature surrounding their own world in order to use his powers on them, essentially rewriting pieces of their world to work by his own rules instead. Fortunately, he is more intent of keeping his head down and experiencing the sensations of the new dimension he finds himself in than causing any lasting harm.
** [[spoiler: Brimstone, the Fallen King, is the disembodied consciousness of the former ruler of the Crafters, essentially an entire race of Minecraft players. Though lacking a physical form, he can BodySurf seemingly at will, inflict various mental tricks including [[LaserGuidedAmnesia memory alteration]], GrandTheftMe, extremely vivid hallucinations, crippling fear, and MindRape, enhance ponies to super-equine levels of strength, speed, and perception, or apparently disintegrate them outright. Fortunately, he stands decidedly against the story's Bid Bad (see below). Unfortunately, his mental state can be accurately described as "a disembodied mass of pure hate and rage" directed towards said Big Bad, and he accordingly does not play well with others.]]
** [[VideoGame/{{Minecraft}} Herobrine]]. The Void Fog found near the bottoms of Minecraft worlds is apparently an extension of his essence, and his first act upon manifesting in Equestria is to use it to spawn [[WalkingWasteland the Wither]]. He can mask himself from mortal detection, create powerful storms at will, enable hostile Mobs to spawn from any dark space over a large area ([[spoiler: at least the size of [[OhCrap Ponyville and the nearby Guard camp]]]]), created inter-dimensional portals wherever he wants and easily gain the upper hand against [[PhysicalGod Princess Luna]] ''[[DreamWeaver inside of a dreamscape]]''. He seeks to [[spoiler: use the Elements to unseal the rest of his power, and will then likely [[OmnicidalManiac destroy all civilization on the planet]].]]
** [[MadGod Era'Doth]]. [[spoiler: It was the source of the Crafters their powers, and later [[ApocalypseHow annihilated them entirely]], apparently only sparing what was left of their king because it was unaware that there even ''was'' anything left. Sometime afterwards, it was somehow torn to pieces, and those pieces were bound in chains of magical light and sealed in extra-dimensional prisons. During the events of the story, its severed head escapes, still wrapped in the chain, and takes the name Herobrine.]]
* ''[[Fanfic/GuardiansWizardsAndKungFuFighters Guardians, Wizards, and Kung-Fu Fighters]]'' has the Cavalcade of Horrors, the entities living in the depths of the Shadow Realm, which are described as being masses of claws and tentacles, with hides that shift between feathers and scales, and too many eyes. And then there's [[UltimateEvil whatever the hell]] lives below them at the very bottom of the Shadow Realm, which they serve and is described as being god-like.
* ''Fanfic/TheBridge'':
** Grand King Ghidorah is presented as one. He only looks like a three-headed golden dragon, but is something so alien in biology that calling him one is a serious understatement. He's also so impossibly ancient that he was a teenager when he and his brother wiped out the dinosaurs.
** The Nexuses of Magic [[spoiler:Bagan, Harmony, and Grogar]] are presented this, with WordOfGod constantly stressing that while they ''resemble'' [[spoiler:a dragon, a pony, and a goat]], they're ''not''. They're just primordial entities that ''look'' like them. They're also so immensely powerful that Grand King Ghidorah is zero match for any of them, even when they're only at 30 percent of their full power and a rampage by one of them is perceived by modern humans as having been a natural disaster as they simply couldn't comprehend that something that strong could actually exist. [[spoiler:Thankfully, Harmony is [[GodIsGood completely benevolent]] and opposing the other two.]]
** [[spoiler:Celestia and Luna]] could be considered lower tier ones, as [[spoiler:they're actually pieces of Harmony's power given life.]]
* Literature/HarryPotter in ''[[https://www.fanfiction.net/s/9512698/17/Master-of-Death-and-What-it-Means Master of Death and What it Means]]'' only appears human because he chooses to. When the Avengers catch a glimpse of his form (despite being warned not to look), it's described as impossibly large and infinite, simultaneously the absence of light and the radiance of a thousand suns, sometimes winged and sometimes horned, with the stardust of universes dripping between it's teeth.
* ''Fanfic/BiomassEffect'': in addition to the things we see in VideoGame/MassEffect and Videogame/{{Prototype}} we have the things created by the "Children of Saleon" virus created by [[MadScientist Dr. Heart]], for reference, this is a virus that is both [[TooSpicyForYogSothoth too spicy for Blacklight]] to consume, can incorporate inorganic matter into its form, and according to Blacklight which can rewrite its DNA however it wants, [[StarfishAliens makes zero biological sense]], examples include:
** Hearts mutant Varren, one of which devours the leftovers from his experiments by vomiting its stomach inside out, wrapping it around its food and using mucus to make it stick before pulling it back in, another, one Heart uses as a LabPet gets [[MercyKill killed]] killed by Blacklight along with the others [[FromASingleCell only to come back as an even bigger, more monstrous version when one of its claws gets chopped off via the door to Hearts escape pod.]] Later, Heart decides to improve it further by giving it [[RoBeast cybernetic implants.]]
** Later, when Heart [[MyGodWhatHaveIDone finally realizes he went too far.]] he tries to destroy his lab via a nuke. When a group of mercs he hired earlier check to see what happened [[spoiler: they find a radioactive monster made from Heart, his pet cyber-varren and the rest of the biomass in the lab.]]
** The Mother Husk, an amphibious, huskified, Kaiju sized amalgam of Saleon virus infused biomass, spaceship wreckage and anything else it assimilated after crash landing in Khar'shans oceans. When Blacklight sends its own giant biomass creature to stop it, the Batarian navy watching describe it as something between a Kaiju Battle and two [[EldritchAbomination cosmic horrors]] duking it out.
** Later the Batarians end up trying to nuke the Mother Husk, [[NiceJobBreakingItHero not only does that make it more powerful, it splatters most of their equipment with Saleon virus biomass]] causing their vehicles to turn into [[MechanicalAbomination mechanical abominations.]]
* In the MagicalGirl CrisisCrossover ''FanFic/ShatteredSkiesTheMorningLights'', [[BigBad Joker]] unleashes [[NoNameGiven "the entity"]], an enormous, unkillable SpaceTimeEater from [[OutsideContextProblem far beyond the boundaries]] of the story's [[TheMultiverse Multiverse]]. Within seconds, "the entity" completely annihilates every post-Go Princess [[Franchise/PrettyCure Precure]] continuity, and devours the futures of all the rest, causing the surviving timelines to collapse together in a catastrophic TimeCrash.
* ''Fanfic/CitadelOfTheHeart'':
** ''Truth and Ideals'' has the infamous Chargestone Cave arc, a plot point planned from the very conception of the story, ending with the climatic showdown against [=MissingNo.=]. Not any of the versions it appears as in Gen I, mind you, but rather, ''[[https://www.deviantart.com/mf217/art/MissingNo-Truth-and-Ideals-606777333 all five versions combined into one singular form of madness]]''.
** For the continuity as a whole, we have [[https://www.deviantart.com/mf217/art/Darigus-the-Sane-760073503 Darigus]] and his primordial father known as [[https://www.deviantart.com/mf217/art/Zenith-Neo-Ultimorian-Canon-584297730 Zenith]].
** White Rabbit truly takes the cake by not having the cosmic element as the two above, but also has a subtlety they lack; White Rabbit normally takes on a variation of its regular form, ranging from [[https://www.deviantart.com/mf217/art/--561652193 small and diminutive]] in stature, to [[https://www.deviantart.com/mf217/art/NOT-SO-FAST-618519709 large and lanky]]. Then there's the appearance it takes [[https://www.deviantart.com/mf217/art/White-Rabbit-CORE-796292505 when it completely begins to suffer an overload]], in which its body tears apart, its head splits clean open and reveals a sphere capable of firing a laser beam, and its wings having completely melted off and reattached as veins. White Rabbit's more Earthly origins leads one to ask many things, but nobody is quite sure as to why exactly White Rabbit's left arm ''[[BodyHorror functions as an esophagus and jaws for fingers]]''.
* ''Fanfic/TheLastDaughter'' has the Endbringers, sentient mountains of organic tissue surrounding a core.
* In ''Fanfic/AvengerOfSteel'', this is how [[spoiler: Trigon]] is presented, being an entity from a dimensional plane above the normal multiverse that is so incomprehensible and powerful that [[BrownNote seeing him would drive most mortals insane]], and a full manifestation by him on Earth would shatter reality. Also, he's literally MadeOfEvil, as after others of his kind cast him into the Heart of Darkness (a dimension that is said to be the source of all evil energies), he ''absorbed it all''.
* While many demons in ''Fanfic/RemnantInferisDOOM'' are horrific to look at, most of them don't go too far beyond either AnimalisticAbomination or HumanoidAbomination territory. The Shadowlord that the first Icon of Sin fought in Hell's beginnings, however, falls squarely into this trope. It was described as an amorphous mass of phallic tentacles and reptilian maws that was gargantuan in size.

[[AC: ''Franchise/{{Digimon}}'']]
* The [[ArcVillain Nightmare virus]] from the ''FanFic/TamersForeverSeries'', which later evolves into a HumanoidAbomination, once it assumes Takato's Image.

[[AC: ''Film/DoctorSleep'']]
* In ''FanFic/TheResurrectionOfRose'', the [[Film/TheShining Overlook Hotel]] is a full-fledged entity that drives the inhabitants insane climaxing in their deaths from murder-suicide. After the events of the film, [[BigBad Rose the Hat]] aims to use it to make herself the most powerful Shiner in existence.

[[AC: ''Series/DoctorWho'']]
* [[https://www.fanfiction.net/s/9827920/1/The-Door-of-the-Demon The Door of the Demon]] has SealedEvilInACan which is [[NothingIsScarier unseen]] except for one of its claw. It is "said to have a face so hideous that anybody who saw it would [[EyeScream tear their eyes out]] rather then see it again."
** Later in this series is [[https://www.fanfiction.net/s/10170307/1/The-Purple-Star The Purple Star]], showing an "Unverse" which is used to imprison such creatures.
* ''Fanfic/TheLastGreatTimeWar'' reveals the the nature and identities of the horrors mentioned by the Tenth Doctor in The End of Time.

[[AC: ''WesternAnimation/TheFairlyOddParents'']]
* In ''FanFic/NeverHadAFriendLikeMe'', it turns out that [[spoiler:Bob the boil on Elmer's face]] is one. He is trapped in a another universe, one where the rules are vastly different, and can only have limited contact with the main universe while in that state. Then Timmy makes just the wrong wish and unleashes [[spoiler:Bob from the boil]], which leads to reality warping around him in a growing orb of influence at his mere presence. And he fully intends to take over and remake the world into how he'd like it.

[[AC: ''VideoGame/FreeSpace'']]
* The fan mod ''VideoGame/BluePlanet'' applies this to the Shivans (who were merely StarfishAliens in the canon games... as far as anyone knows). Shivans in the BP-verse are [[spoiler:implied to be tied to the very fabric of reality, and are eternal, infinite, and (as a whole) invincible.]] They are also described as being "as far above humanity as humanity is above a protein chain". Much of exactly ''what'' they are is obscured through some very strange TechnoBabble, for example, they were described as not being "made" but rather "calculated". Being in contact for a brief few minutes with the Shivan consciousness contains a real risk of the human going completely insane from the experience, and several times Ken deliberately cuts off contact to certain parts of it to protect the player's mental stability.

[[AC: ''Anime/MobileSuitGundamIronBloodedOrphans'']]
* ''[[https://www.fanfiction.net/s/12484040/1/The-Devil-s-Reprisal The Devil's Reprisal]]'' has heavy shades of this on several counts.
* The [[MechanicalAbomination Hashmal]] is awoken early by [[spoiler: Teiwaz]] during a failed hit against the main characters, resulting in a somewhat terrifying Lovecraftian entrance. [[VonNeumannMachine It can self replicate to an unknown extent]].
* All Gundams are this, to a degree.

[[AC: ''Franchise/HarryPotter'']]
* ''[[http://www.fanfiction.net/s/9172846/1/Deathly-Hallowed Deathly Hallowed]]'' portrays [[TheGrimReaper Death]] as this. Lily summons it to [[DealWithTheDevil make a bargain with it]]. She'll return it's cloak in exchange for Death protecting her son. However, even after using a ritual to allow it a form, it's described as having "Far too many hands, too many eyes, too many mouths" and can only seem to speak in a almost [[MindRape mind-raping]] form of telepathy or BlackSpeech.
** Perhaps worse are all the Eldritch Abominations that seem to be after both Harry and Death.
* Rabbit in ''[[https://www.fanfiction.net/s/9911469/1/Lily-and-the-Art-of-Being-Sisyphus Lily and the Art of Being Sisyphus]]''. Of course it's not really a rabbit but some cosmic horror from beyond reality that Lily has forced into the shape of a rabbit when she pulls it out of a hat and she fears that if she leaves it unattended, it will eat Scotland.
* The [[OurGodsAreDifferent Perennials]] in FanFic/KingOfKingsRulingOverRulers. A species of ultra-dimensional beings which are the physical and metaphysical embodiments of what creation itself acknowledges as "true concepts". It is impossible to kill a Perennial, and the first attempt to do so both failed and succeeded. The Sacred Twelve (aka Progenitors) are known for assuming...uncanny shapes.
** The being known as Ayavan [[TheDreaded is regarded as this]] by the Perennials themselves, to the point where they waged an entire war in an attempt at destroying him. [[spoiler: They failed.]]
* Mort in ''[[https://www.fanfiction.net/s/12754810/1/Monsterous Monsterous]]'' is a being of smoke and shadows that can grow a hardened spiked carapace in an instant, moves on four legs or two as it feels appropriate, has a tail that ends in three prehensile claws, and lacks any sort of face. On top of this it's shown to change size from a large horse to an [[Literature/TheLordOfTheRings Oliphant]] and anywhere in between along with casually changing it's skeletal structure (it once "flexed the bones" of its skull out of boredom) and is capable of using magic. [[spoiler:Oh and [[WasOnceAMan it used to be Harry Potter]].]]

[[AC: ''WesternAnimation/InvaderZim'']]
* [[https://archiveofourown.org/works/19213330 This]] fanfic features an entity called Shlog'ec'mer, a massive tentacled blob that is capable of disguising its form (in the story's present, it takes on the appearance of a carnival's haunted house attraction), and which claims to be from beyond the universe as it's understood by three-dimensional beings. It travels between worlds, ensnaring victims who it places in {{Lotus Eater Machine}}s that trap them in their [[YourWorstNightmare worst nightmares]] so that it can [[EmotionEater feed on their fear]]. [[spoiler: It does this to Gaz, Zim, and Dib, but when it tries on [[CloudCuckoolander GIR]], it ends up [[TooSpicyForYogSothoth going insane and dying]].]]

[[AC: ''WesternAnimation/JackieChanAdventures'']]
* ''FanFic/{{Webwork}}'' has the entities that [[CosmicChessGame sit in control]] of the BalanceBetweenGoodAndEvil, referred to only as IT (evil) and OTHER (good). They've apparently existed since at least the dawn of time (or possibly even earlier), are never properly described, and are so powerful that just being in IT's presence ''terrifies'' Tarakudo.
* In ''FanFic/AgesOfShadow'', [[FallenHero Jade]] evolves into one over the course of the [[TimeAbyss countless centuries]] she spends [[SealedEvilInACan locked away]] in the Shadow Realm. Having already become an unstoppable, immortal PhysicalGod (which is what required her being sealed away in the first place), she slowly warps her body into a new form in order to better adapt to the nature of the Realm (and just as something to do) -- she gives herself a tail, turns her now pointless legs into extra arms, and turns her hair into tentacles, among other things. And then she encounters an [[AlternateUniverse alternate Earth]], where she gets her own cult, which worships her for thousands of years and seeks to unleash her to conquer the world. All this combined with her [[GoMadFromTheIsolation isolation-induced madness]] giving her borderline BlueAndOrangeMorality, and she's really hitting all the points of this trope.

[[AC: ''Manga/KatekyoHitmanReborn'']]
* ''[[http://archiveofourown.org/works/5562169 Dead-Eyed Tsuna]]'' has the eldritch abomination be [[spoiler: the protagonist Tsuna himself]] by having ash leak out of his wounds and heal them.

[[AC: ''WesternAnimation/KimPossible'']]
* ''FanFic/BloodBondBloodOmenSeries'' culminates in [[spoiler:a fight against [[NamesToRunAwayFromReallyFast the Unshaper]] that is using the Go family as its avatars so it can swallow the Earth whole]].

[[AC: ''Franchise/KingdomHearts'']]
* ''FanFic/KingdomHeartsIIITheHeartsGreatestWeapon'' has [[spoiler:Darkness, a massive creature who spawned the Heartless and, by extension, the Nobodies, and took over Kingdom Hearts itself.]]
* ''[[https://www.fanfiction.net/s/5740264/1/Fill-the-Moon Fill the Moon]]'':
** Hollowmoon, a colossal creature that is the AnthropomorphicPersonification of the darkness within Kingdom Hearts. It's implied that it [[DrivenToSuicide drove the protagonist to suicide]].
** There's also the [[spoiler:AnthropomorphicPersonification of Kingdom Hearts. Hollowmoon is her brother, and they're implied to have an [[BrotherSisterIncest incestuous relationship]].]]

[[AC: ''Franchise/TheLegendOfZelda'']]
* In ''FanFic/LegendOfZeldaSacredReliquary'', one stalks the streets of Hyrule Castle Town at night. [[spoiler: Its true form is apparently Dark Link.]]
* In the ''FanFic/BoundDestiniesTrilogy'', [[VideoGame/TheLegendOfZeldaMajorasMask Majora]] is even more eldritch than in canon, subjecting Link to TheCorruption in ''Blood and Spirit''. WordOfGod establishes Majora as the Terminian counterpart to [[GodOfEvil Demise]].

[[AC: ''Franchise/LesMiserables'']]
* The expanded FanVerse of ''FanFic/ParisBurning'' includes several of these, the most prominent of which resides under the Antarctic ice and seems to be implementing an AssimilationPlot. Others include the broken giant that resides in the Grand Canyon, the northern ice that has a lock on pretty much all of Canada, things moving underground in the east, Aberdeen's father, and the sighing mountains. They all hate Antarctica because it is the runt of the litter.

[[AC: ''WesternAnimation/TheLoudHouse'']]
* In ''Fanfic/{{Revival}}'', [[BigBad Maya Lottie]] is in truth the voice of the Outer Gods Nyarlathotep who manipulates Lana into reading the Necronomicon as a means of freeing the other Outer Gods. Nyarlathotep mainly appears as a 12-year-old girl due to mocking her slave over him killing his daughter and his family.

[[AC: ''Franchise/MassEffect'']]
* The Reapers were this already, but in ''[[http://www.fanfiction.net/s/5339492/1/Spectre Spectre]]'' Sovereign has taken it to new heights, all but [[MindRape mind raping]] Shepard on more than one occasion.
* The Reapers once again, in ''Fanfic/MassEffectEndOfDays'', where we get to observe the thoughts of [[spoiler: the Reaper-larvae from the Collector base as it gains consciousness. While the Reapers have yet to make a ''proper'' appearance]], they are shaping up to becoming fullblown Eldritch.
-->[[spoiler: '''It was ''magnificent''. The Entity moved towards the Light, and the Light grew ever larger, blowing away the darkness. A shape took form, and It saw Its [[AssimilationPlot new form]], and Its [[AscendToAHigherPlaneOfExistence previous world]] clearly. As starlight reflected on the waters' surface. The stars' light will not be extinguished. As long as They exist in the sky, starlight will remain on the water...'''\\
\\
'''...And [[ViciousCycle this]] is a thing which already was.''']]
* The Leviathans in ''Fanfic/OfSheepAndBattleChicken'' are so far beyond other life forms that they barely understand it, and even a single elder Leviathan is so powerful that the Reapers think committing hundreds or thousands of themselves against a single 'Old One' is an entirely appropriate response... and the odds of a Pyrrhic victory are all too likely.

[[AC: ''WesternAnimation/MyLittlePonyFriendshipIsMagic'']]
* The original VideoGame/GarrysMod Applejack model was so [[UncannyValley freaky]] that it was reinvented as [[https://www.youtube.com/watch?v=mL5-8R6Kklg Eppaljeck]], in the style of other [=GMod=] abominations (see below).
* In the early days of the fandom Celestia and Luna were [[AlternativeCharacterInterpretation interpreted]] as benevolent Abominations instead of "mere" {{Physical God}}desses, due to their [[ReallySevenHundredYearsOld incredible age]] (Luna is more frustrated that being imprisoned in the moon for a thousand years means she's a FishOutOfTemporalWater, rather than from ''[[AndIMustScream being imprisoned for a thousand years]]''), almost unmatched power, NonStandardCharacterDesign, and being [[GodEmperor worshiped as deities]] by their subjects with a combination of unquestioning obedience and paralyzing fear. However, after season 2 and the reveal of Discord (see below) that interpretation fell well into the minority.
** ''[[http://www.equestriadaily.com/2011/05/story-merely-mare.html Merely a Mare]]'' has Luna casually mention that she and her sister are more than ''four hundred '''million''''' years old, spending most of that time playing in the glaciers and lava flows of the planet respectively, and the mane six are continually reminded that the two are very much Other.
* [[CloudCuckooLander Pinkie]] [[GenkiGirl Pie]] is sometimes written as an [[HumanoidAbomination Equine Abomination]]. There is a high amount of supporting evidence, what with her tendency to [[OffscreenTeleportation appear wherever she wants whenever she wants]] (much to the horror of Rainbow Dash and Cranky Doodle), including in places that couldn't possibly be large enough, her mastery of {{Hammerspace}}, and her apparent MediumAwareness, things which are explicitly noted in the show as being weird and unexplainable. Though this can simply be due to Pinkie Pie being an extremely powerful reality warper or being a good Abomination
* [[GodOfChaos Discord]] is frequently written (most famously in the ''FanFic/PonyPOVSeries'') as [[AnthropomorphicPersonification the personification of chaos itself]], whose [[RealityWarper near-unlimited power]] stems from him being so fundamentally opposed to ''reality itself'' that they reject each other, allowing him to make pretzels out of physics, and is [[EvilCannotComprehendGood completely incapable of comprehending]] things that are remotely orderly or sane.
* ''Fanfic/EquestrianAllianceProjectOblivion'' features [[spoiler:Shub-Niggurath]], an Outer God of the Franchise/CthulhuMythos, as [[spoiler:the primary BigBad.]]
* In ''[[http://www.fimfiction.net/story/1451/6/The-Monster-Mash/Twilight-Sparkle%3A-The-Case-of-Wild-Clover-the-Warder Twilight Sparkle: The Case of Wild Clover]]'', the eldritch abomination [[spoiler:is you]].
* ''Fanfic/PonyPOVSeries'':
** [[spoiler:Discord's parents]] Entropy and Havoc, respectively the {{Anthropomorphic Personification}}s of Heat Death and Mass Hysteria. The former is so massive that her just ''rising'' from the ocean of chaos she calls home creates waves that could drown ''continents'', and if she merely ''says'' someone doesn't exist (at least, in her own realm), then they ''never did''. The latter is described as every fear that ever has, does, or ever will exist personified, and is so horrific to behold that just ''looking'' at him will leave a mortal pony incapable of sleeping for the rest of their days at ''best''. Entropy erasing Havoc from existence, then him ''willing himself back into it'' is equal to one member of a bickering couple shoving the other. Both have severe BlueAndOrangeMorality, Entropy viewing nothing as of value (even her own children) while Havoc's is described as, while valid, so alien its impossible for the personification of ''Wisdom'' to put it in words a mortal can comprehend. At one point Havoc [[DidWeJustHaveTeaWithCthulhu explains to Twilight]] that the reason he doesn't step in to stop Discord's actions is because just an Avatar of his emerging in the mortal realm would ''destroy Equestria's whole East Coast''. The Windigos are tiny pieces of Entropy as well. [[spoiler:And one of Entropy's mortal incarnations is ''Maud Pie''. And because of Her nature as an Elder, all Mauds are part of Entropy.]]
** [[spoiler:Celestia's parents]] are just as massive, powerful, and [[YouCannotGraspTheTrueForm indescribable]], but are among the kindest beings in existence, even stepping in and [[spoiler:saving the pony world from Havoc and Entropy's wrath when they were accidentally enraged]] and being in the presence of either is described as reassuring and pleasant. The Father of All Alicorns is stated to ''[[GeniusLoci be]]'' Pony Heaven. All four Elders are multiversal singularities, meaning every alternate version of them is merely another part of the same being.
** Discord's repeatedly cameoed cousin Ponythulu, who seems to be this trope played for laughs, as he's yet to do anything remotely evil, and actually seems downright ''[[DidWeJustHaveTeaWithCthulhu friendly]]''.
** [[SuperpoweredEvilSide Nightmares]] tend to have traits of this, but the "Super Nightmares" (who have managed to mutate somehow) fit it to a T. Nightmare [[spoiler:Whisper is a gigantic, vaguely dragon-like monstrosity with a burned and blackened hole in her chest and exposed with an undead foal inside]] due to [[spoiler:sucking all of Equestria's sins and evil into herself (trapping all those effected in a LotusEaterMachine or reducing them to a foal) and obtaining the Elder Horn.]] Nightmare Mirror is an equally huge MultiversalConqueror with wings covered in ''eyes'' who can [[spoiler:force the victim to witness the harshest truths about themselves]] if they look in them and is described as having a [[YouCannotGraspTheTrueForm constantly shapeshifting form.]] While [[spoiler:Nightmare Eclipse/Paradox]] has a lot of traits of one, she leans more towards being a [[HumanoidAbomination Equineoid Abomination]], though [[spoiler:one of her PsychoRangers, Nightmare Banneret (Spike's Nightmare) resembles one.]]
** By the time of the FinalBattle between Shining Armor and Makarov, [[spoiler:the latter has mutated from a mere [[HumanoidAbomination Equineoid Abomination]] into one of these; merely ''glimpsing'' its true form nearly causes Shining's mind to ''shut down''.]]
** The Shadows Who Make, Watch, and Rule, beings beyond even the Elders, who Celestia refuses to describe to anyone in-universe, since she knows it would cause them to GoMadFromTheRevelation. [[spoiler:They turn out to be [[HumansAreCthulhu the writers, readers, and Hasbro]], respectively.]]
** King Sombra is presented as one in the brief OriginsEpisode Alex Warlorn gave him after finally watching Season 3 -- he's the embodiment of the crystal ponies' collective fears, which they were tricked into purging from their hearts by one of Discord's cousins (who themselves count) in the belief that this would grant them further protection from Discord. Instead they got a monster whose every act was literally everything they ever feared would happen to them. [[FromBadToWorse And then]], [[ItCanThink he developed full sentience]]...
** As shown in a flashback episode to the FinalBattle of the Age of Myths (the G1 era), [[spoiler: there was Lilith, the First Witch and Queen of the Witches, the {{predecessor|villain}} to all the witches and warlocks from G1. While she was humanoid, she was also [[MadeOfEvil composed of pure evil magic]], and so strong she could have ''[[OmnicidalManiac drained the life from the whole world]]'' leaving nothing but dust and the {{living shadow}}s of people she'd reduced to mindless servants. Even after the G1 Mane Cast defeated her by draining all her power into the [[ArtifactOfDoom Alicorn Amulet]], she still survived and returned later as the Shadow Queen.]]
** There's also the Outer Concepts, the Draconequi's cousins. Ponythulhu is one of them (and the TokenGoodTeammate), and they're based off Lovecraft's work in design and theme. The most prominent member is Nyarlathotrot ([[spoiler:who serves as one of the main villains of the Rumors Arc]]), who is the personification of the combined darkness of the aforementioned Shadows Who Are and makes the Grim Dark Worlds for them. He's also [[HiveMind composed of one thousand different Avatars]], each no less him but also their individual entity. He's also the above mentioned King Sombra's ''father''. Other members of his family are Abandon (the Spirit of Sadomasochism), [[WesternAnimation/{{Coraline}} the Beldam]], Yog-Sothorse, [[MotherOfAThousandYoung Shub-Neighurath]], and their [[TopGod Elder]] Azerhorse. Also LovecraftLite, as they seem no stronger than the other genuinely benevolent deities and can be defeated by them, but they are certainly dangerous.
** [[spoiler:Nightmare Phobia]], the BigBad of the Chaos Verse (an official spinoff of the ''POV Series''), is made from [[spoiler:the remains of Nightmare Moon's essence]], and exists primarily in the collective subconscious of ponykind. And that's ''before'' she goes OneWingedAngel, at which point she [[spoiler:becomes a sentient void, which consumes Discord's pocket dimension and nearly emerges into the real world, which causes ''every living thing'' extreme pain]].
* From the same author, [[http://fav.me/d7vi0g9 My Little Pony G3 Pony Tales vs Hatred]]. The G3 Ponies are plagued by nightmares based off cruel things G3 haters say about the series. It turns out [[spoiler:the BigBad is one of these, taking the shape of a massive living storm shaped like a serpent ''literally'' as big as Ponyland itself and composed of the hatred and intolerance fans have for the G3 (Alexwarlorn often takes things like cliches or fandom reactions and uses them as inspiration for Cosmic Horror Stories). ]] However, [[spoiler:[[LovecraftLite the storm serpent is defeated]] by [[ThePowerOfLove the combined love and tolerance of all of Ponyland.]]]] It's better than it sounds.
* In ''Fanfic/UnderTheNorthernLights'', Luna's and Celestia's greatuncles and greataunts are described in a vision as "lights... sounds... patterns of magic in a black sphere that itched the brain and made the soul cry". They decided the laws of nature, seemingly on a whim. The only hostile one seems to be Discord, though, and his reality warping powers are presumably because he never agreed to what his siblings decided. The generation of their parents has some traits of eldritch abominations but are more like OurTitansAreDifferent, having motivations similar to mortal ungulates despite their ancient age, huge size, and inequine shape.
* ''Fanfic/TheStarsWillAidTheirEscape'' just cuts to the chase and outright crosses over with the Franchise/CthulhuMythos. Therefore, the BigBad is a stallion avatar of Nyarlathotep who hides his face behind a mask, as seeing it causes the viewer to go insane [[spoiler:which is what happens to Twilight]]; his {{Mooks}} are the Dark Young of Shub-Niggurath; and in true Mythos fashion, Trixie goes crazy after using the ''[[TomeOfEldritchLore Neighcronomicon]]'' and seeing the Young for the first time.
* ''Blog/{{Moonstuck}}'', [[VileVillainSaccharineShow of all works]], has [[spoiler:Discord]]. He uses an EnemyWithout and a personification of depression as his puppets, drastically distorts and at one point ''shatters'' the fourth wall and the ''narration'', and his speech and appearance are very similar to [[Anime/TengenToppaGurrenLagann the Anti-Spirals]] (probably deliberately, as the author is a fan).
* ''Fanfic/AFutureOfFriendshipAHistoryOfHate'': The [[BenevolentPrecursors Sentiox]] came into being [[TimeAbyss billions of years ago]] (and have since moved on to another plane of existence), came in a vast variety of forms (some rather normal-looking, some... not), and were powerful enough to create worlds... or in the case of [[BigBad Ruinate]], easily [[OmnicidalManiac destroy them]]. And speaking of Ruinate, he's one of the more otherworldly-looking Sentiox, being a large, vaguely frog-like creature, with three red eyes with cat-like slits, surrounded by (and possibly made of) a miasma of dark energy.
* Blog/ReadingRainbowverse: Parodied by the blog's version of the Shadowbolts. They're definitely eldritch, and they can only be seen by Lightning Dust... but they only irritate her instead of driving her mad and the worse thing they've done is draw a penis on her forehead.
* ''Fanfic/NightmaresAreTragic'': This is true not only of the villainous and extradimensional Night Shadows, but also of ''all'' Cosmic beings in our own Universe, including not only the Draconequii but even the Alicorns. The Alicorn Avatars in which Celestia and Luna incarnate are AFormYouAreComfortableWith.
* ''Fanfic/TheTearsOfGaia'':
** [[GreaterScopeVillain The Blight]] is a sentient [[TheCorruption corruption]] in the form of a black cloud that turns anything exposed to it into twisted, monstrous versions of themselves, driven by a desire to corrupt or kill others. And as shown in the opening CreationMyth, it was even capable of corrupting ''gods'', as it turned Discord and the other Draconequii from benevolent caretakers of the world into monsters out to destroy it.
** The Draconequii and Alicorns themselves, being nearly as old as the universe, with their physical forms being AFormYouAreComfortableWith designed to let them walk among their creations. Celestia and Luna are ''weak'' compared to their siblings, having given up their divinity to live directly with their subjects.
** The... ''thing'' in the dimensional rift where the Tears of Gaia were stored. We don't get a good look at it, but it's large enough that Twilight and her friends [[ThatsNoMoon mistake one of its eyes for a]] ''[[ThatsNoMoon moon]]'' initially, and the sound of its voice nearly deafens them.
* ''Fanfic/BlackQueenRedKing'' has at least three: [[spoiler: Rex, Queen Chrysalis,]][[note]]Though it's only their souls that qualify. [[spoiler: Rex's]] soul has been described as ''"[his soul] glowed with a blindingly bright darkness."''[[/note]] and Death/Chaos[[note]] Not the same as Discord[[/note]].
* ''Fanfic/BesidesTheWillOfEvil'': The BigBad wants to devour all the magic and every living thing in the universe, and occasionally reverts from his normal caribou body into a great floating mass of flesh and eyes and antlers. He was also so bad that the two previous names he went by can't be said by anyone else except Discord. He currently goes by Reiziger.
* ''Fanfic/TheElementsOfFriendship'': Book 1 has the Miasma, the abomination that turned [[WhatCouldHaveBeen Queen Selena]] into Nightmare Moon. And it's only one member of an extraterrestrial race of [[PuppeteerParasite Puppeteer Parasites]].
-->'''Crescent Rose''': The Miasmata are an abominable race of eldritch beasts from The Far Beyond. They feed by taking control of a lifeform and all of its powers, until the victim is exhausted. A victim can be more easily dominated if they are twisted by anger or rage.
* ''Fanfic/TheWorldIsFilledWithMonsters'': The entity brining the darkness to Hazelnacht, a vast living nightmare that manifests as a hole in the sky before erupting into a misshapen flood of body parts stretching and roiling across the heavens.
-->''It swelled. It breathed. High overhead, filling half the vault of heaven, the nightmare was born once more. It roiled and billowed and swallowed itself and blossomed, sprouting twisted wings and claws and beaks and tails; cancers and horns and shells and raw, weeping nerves and teeth that fit in no mouth and misshapen genitals both male and female. But none of these Vermilion noticed for more than a moment, because all he could see were its eyes, eyes that erupted like blisters from every aspect of its body, an eye for every pony in the world, and they all looked down at him.''

[[AC: ''Anime/{{Naruto}}'']]
* ''Fanfic/DestinyIsAHazyThing'': The Bijuu's AnimalisticAbomination forms were actually forced upon them by the Rikudo Sennin; their real forms are far more alien. Shukaku's true form, the only one seen so far, most closely resembles a massive sandstorm filled with lightning.

[[AC: ''Anime/NeonGenesisEvangelion'']]
* ''Fanfic/ACrownOfStars'': Daniel and their family's true shapes are pretty incomprehensible and confusing to human senses. Even post-fusion with Lilith Rei Ayanami gets disturbed by Daniel.
* ''Fanfic/TheChildOfLove'':
** In chapter 3 a fanmade Angel shows up. It looks like a thin feather with a sphere on the top. An examination reveals that it might seem light but it weighs 3,000,000,000 tons.
** In chapter 7 another fanmade Angel shows up. It looked like a winged Evangelion unit.
* ''FanfiC/DoingItRightThisTime'': After returning to the past, Shinji, Asuka and Rei have to fight the giant alien Angels... again. The "alien goddess in the basement who may or may not be God" Lilith is also mentioned.
* ''Fanfic/{{HERZ}}'': In addition to the Angels the cast defeated in the backstory, the alien deities and Seeds of Life Adam and Lilith [[spoiler:whom Rei absorbed]] and the MP-Evas, several countries try to create their own Evangelion, and sometimes they spawn shapeless, massive monsters with too many limbs and heads sprouting from strange places. SEELE also created a new batch of MP-Evas to fight the main characters.
* In ''Fanfic/NeonGenesisEvangelionGenocide'' new Angels appear, [[spoiler:though they are in reality artificially created from the flesh of a rogue Evangelion unity, made by an advanced computer program, which has the ability to manipulate the DNA found in Evas on a molecular level]]. One of them is a massive inky blob that turns into a sphere of black energy.
* ''FanFic/NobodyDies'': Rei Ayanami is this. The Angels, bizarrely enough, are a bit less Eldritch than they were in the series, due to actually having characters, motivations, and bothering to communicate with the heroes. Even then, constructs like [[spoiler:whatever the hell 02-Ef A9 becomes]] still count.
* ''Fanfic/HigherLearning'': The giant aliens Angels of the original series also show up here. Special mention goes to Bardiel, since [[spoiler:he was defeated in a very different way, and he was unable to hijack Unit-03]]. Its true body resembled a black, amorphous stormcloud.
* ''Fanfic/OnceMoreWithFeeling'' sees Shinji having to fight the Angel again... and unfortunately they seem more powerful than they were in the original timeline.
* ''Fanfic/TheOneILoveIs'': Nearly all of the Angels are true to their canon selves, except for Tabris. He is [[spoiler:a her in this story]]. Adam -- the father of the Angels -- and Lilith -- mother of all life on Earth -- also show up. In addition to them [[spoiler:Gendo manages to merge with both Adam and Lilith at the end of the story.]]

[[AC: ''VideoGame/Persona4'']]
* [[http://www.fanfiction.net/s/4798922/1/ ''Persona 4: Five Years Later'']] has [[spoiler: Amatsu Mikaboshi, a sentient void without a self-identity, instead referring to himself as "the entity", a barely-sentient but very intelligent incarnation of the Void that existed before time, utterly devoid of human influence. Souji can only classify the Amatsu as pure nothingness, and Igor describes it as similar to Nyx]].

[[AC: ''Franchise/{{Pokemon}}'']]
* ''Fanfic/LatiasJourney'' is chock full of Abominations all led and mostly created by the BigBad Deoxys (who is one himself), being the embodiment of [[ChaoticEvil evil and chaos]]. Others include:
** Dark Latios, the evil undead brother of the main protagonist who ends up [[MindRape mind raping]] her until she transforms into an EldritchAbomination herself.
** Mewgle, a ShoutOut to the Moogles from ''Franchise/FinalFantasy''. Starting off as the innocent dungeon master of Team Rocket's virtual reality software, Mewgle is recruited by Deoxys and turns into a sadistic KillerGameMaster with JokerImmunity.
** Leviathan, an enormous red serpent who devours all the Ghost Pokemon in the world and is made out of thousands of corpses. Oh, and [[spoiler: she is Latias' mutated mother.]]
** The sequel, ''Fanfic/BraveNewWorld'', has abominations like [[{{Orochi}} Yamatorochi]] and Jovi after Tarantulas's experiments. [[GodOfEvil Giratina]] is still an Eldritch, and other beasties like the [[PlanetEater Gaiavore]] are sure to show up later.
*** Leviathan also returns as a creation of the Ruler of Evil used during the Crisis Wars.
*** Arackaiser [[spoiler: merges the [[FaceHeelTurn legendary birds]] into Maelstrom during the Battle of Shimmer Desert. He does the same thing to the [[BrainwashedAndCrazy legendary beasts]], merging them into Cerberus, who is [[AnticlimaxBoss easily separated]] by Leo]].
* ''Fanfic/PokemonMysteryDungeonJournal'' has [[spoiler:Heath, the main character,]] being revealed as one of these midway through the story. It's a shock even to him.
* ''FanFic/TheSunSoul'' has its depiction of Zapdos, who is somewhere between this and OlympusMons.
-->'''Sabrina''': ...a nameless thing [[TimeAbyss predating humanity by countless centuries]]. Team Rocket called it Zapdos, but when I bent all of my power to putting it to sleep and my mind touched its surface thoughts, I immediately knew that [[YouCannotGraspTheTrueForm no name anyone could give that thing could properly describe its... essence]]. Simply forcing Zapdos into a sleep deep enough to allow for safely moving it claimed the lives of two of my psychics. Their minds [[GoMadFromTheRevelation couldn't handle the contact and burned out]], but thanks to them, we safely moved Zapdos to the old power plant and began siphoning off its energy.
* In ''FanFic/ThePowerThatsInside'', [[spoiler: Meowth becomes a GlitchEntity. for a moment after having his energy harvested.]]
* In ''Fanfic/PokemonResetBloodlines'', there's ''MissingNo'' itself, originated as a remnant of the previous timeline. It's apparently been known for several demonic names, and takes great pleasure in tormenting Ash about the things that have happened or will happen to his friends, knowing that he can't do anything about it.
* The various Legendaries in ''Fanfic/{{Traveler}}'' aren't so much powerful Pokémon as they are gods whose mere presence can wipe out entire regions. The Legendary Birds in particular have a possibly [[GameFace true form that turns them into masses of their element in the rough shape of a bird]], such as Moltres being a towering inferno that resembles a bird with molten lava for legs. The [[Anime/Pokemon2000 massive storm the Shamouti birds caused that would wipe out the world]]? That was nothing but a territorial display between the three; and Lugia confesses that each is only a third as strong as they used to be.

[[AC: ''Anime/PuellaMagiMadokaMagica'']]

* Esurientes assume the place of Witches in the Madoka fanfic ''FanFic/CibusEsculentusMadokaMagica''. Originating as humans overloaded with negativity, they manifest as all manner of predatory beasts. They maintain barriers to avoid detection by normal humans in order to eat without disruption, and once they eat enough, they then burst into spawn.

[[AC: ''WesternAnimation/RandyCunninghamNinthGradeNinja'']]
* ''Fanfic/EnterKenFinlayson'' features Moloch the Death Raptor, one of the animalistic variety, who basically comes across as the Owlman from ''Series/LostTapes'' transplanted into a Randy Cunningham fan fiction.

[[AC: ''Franchise/SailorMoon'']]
* ''Fanfic/CelestialWarriorMoon'':
** The Entity behind the Dark Kingdom, who is really [[spoiler:Queen Metalia]]. The Entity arrived in the galaxy during the Silver Millennium and being a GalacticConquerer. Myddin's description of her is nothing short of Lovecraftian, and Ami flat out compares the Entity to Lovecraft's work.
--->'''Myddin''': Something dark entered our galaxy. What It was, is still unclear. Its intentions, however, could not be less ambiguous. It was a harbinger of chaos and destruction, reaping death wherever it went. My people were quick to intercept Its path, and It did not take kindly to us. I accompanied them to serve as witness to the event. I could never properly describe the beast before us. Envision viewing something through the extremities of your peripheral vision. It appeared as blurred, soft, and weak. No hard angles or sharp edges. Its true form remained hidden to me, a shapeless form concealed under a cloak of hollowness. In a word: imprecise.
** The Slender Man also shows up, named the Black King here.

[[AC: ''Franchise/TheSlenderManMythos'']]
* In ''Fanfic/ByTheFiresLight'', the Slender Man is implied to hail from TheDarkTimes and ends up bringing a bunch of [[EldritchAbomination his pals]] to reclaim the Earth at the end of the story.

[[AC: ''Franchise/SonicTheHedgehog'']]
* ''Fanfic/SonicXDarkChaos'':
** Dark Tails, the GreaterScopeVillain, is a physical manifestation of the Seedrians' collective terror of Tsali [[spoiler:and strongly implied to be a Forerunner in the rewrite]]. He begins to spread [[TheCorruption Dark Chaos Energy]] across the galaxy and is literally MadeOfEvil. During the final battle, he transforms from a gigantic multi-headed space dragon to an [[GeniusLoci entire sentient planet]]. And then he mutates into a [[YouCannotGraspTheTrueForm a literally incomprehensible mass]] of tentacles, eyes, mouths, and [[AndIMustScream voices crying in eternal agony]]. It's rather telling that it eventually took three Hyper-powered hedgehogs and ''both Satan and Jesus Christ in person'' (combined) to finally beat him [[spoiler:[[CruelTwistEnding which ends up backfiring horribly]]]].
** [[AbusivePrecursors The Forerunners]] are an entire race of these, [[SealedEvilInACan sealed deep inside the depths of Warpspace long ago]]. [[spoiler:And it turns out they're [[EnemyCivilWar not all]] [[DefectorFromDecadence evil]] either]]. And it turns out Sonic and friends have already seen some - [[spoiler:the Chao from the games are actually infant Forerunners.]]

[[AC: ''Franchise/StarWars'']]
* The Forceless Collective in the ''[[FanFic/StarWarsParanormalitiesTrilogy Star Wars: Paranormalities Trilogy]]'' is an entire faction of these from another galaxy. Not only would Force-sensitives sense something off the light-dark spectrum of the Force from these things, but they are disconnected from the universe by being a dead spot in TheForce and are implied not to be natural forms of life. Their primary symbiotic form, the [[BlobMonster Black Matter]], is not unlike Mnggal-Mnggal in the [[{{EldritchAbomination/Literature}} Literature section]]. Unlike Mnggal-Mnggal however, the victims it possesses are still alive and conscious and can live for as long as several thousand years. If the host gets along with the symbiote, everything goes fine for the host, [[AndIMustScream but if not, they lose control of their bodies while they still have access to their senses.]] (and Forceless are usually pretty ruthless). The creatures they possess also get [[BodyHorror mutated]] in the process of symbiosis, and some of them, particularly some of the [[SealedEvilInACan Archfiends]], qualify as abominations themselves.
* The Sleeper from ''Fanfic/TheDesertStorm'' series, more so than in canon. Its a tentacled monster living in the Water of Life, which is the source of Dathomir's power. It's [[ItCanThink fully sentient]], [[TimeAbyss impossibly ancient]], manifests as a giant horned Nightsister WreathedInFlames, can [[MindRape enter a person's mind]] with ease, has knowledge of the future, and is strong enough to sever the soul bond [[spoiler:between Ben and Obi-Wan]]. The Sleeper also possesses ResurrectiveImmortality, having already been killed many times by Nightsisters as a RiteOfPassage, and feeds off of Dathomir's LifeEnergy to survive. As if all that wasn’t enough, the creature claims to be the MonsterProgenitor of the Nightsisters.

[[AC: ''Franchise/{{Superman}}'']]
* ''Fanfic/HellsisterTrilogy'' has ComicBook/{{Darkseid}}, Franchise/TheDCU's GodOfEvil who is powerful enough to squash [[Franchise/{{Superman}} any]] [[ComicBook/{{Supergirl}} hero]] or kill his minions and bring them back to life.
* ''Fanfic/AForceOfFour'' has Mars, the immortal personification of War and conflict, scheming to destroy Earth and force all human souls to strengthening him by fighting forever.

[[AC: ''Franchise/SuperMarioBros'']]
* As revealed in Movie 1 of ''FanFic/ClashOfTheElements'', [[spoiler: Pandora, the dragon trapped within Subspace, is one of these, and it is said that it has the capacity to be able to drag an entire world into Subspace if it were to ever fully emerge from a Subspace Orb. It is also stated to have a rather netherworldly glow around it...]]

[[AC: ''VideoGame/TeamFortress2'']]
* In the ''VideoGame/TeamFortress2'' fandom, use of VideoGame/GarrysMod had created multiple popular freaks. The most popular and well-defined are dubbed (in no particular order) Painis Cupcake, Snyphurr, Dic Soupcan, the Odd Scout, and Vagineer. Painis Cupcake twists his body in ways that will instantly kill or disable a normal individual, and is a morbid cannibal who seldom says anything except "I am Painis Cupcake! I will eat you!". Snyphurr is a giant torso with a concealed, bloody head; he turns people into stone. Dic Soupcan floats, mumbles irritatingly, and has multiple Gran-Mal seizures and will regurgitate explosives if agitated. The Odd Scout is distorted past even [[Franchise/TheSlenderManMythos Slender Man]] proportions, converts other Scouts into its own distorted likeness, and can make YourHeadAsplode through eye contact. The Vagineer is the original, and probably the worst, speaking only [[BlackSpeech backwards]] and with powers ranging from using body parts of others to repair itself to corrupting others by its mere presence.

[[AC: ''WesternAnimation/TotalDrama'']]
* ''Fanfic/TheDoctorWillSeeYouNow'': The hints of the darkness that have been given titles (the Voice, Something beyond humanity, #409) show a complete disregard for humanity, even if their actions and presence harm them. The Voice either creates or allows vividly real visions of truly horrifying images of teenager’s gruesome deaths, complete with feeling the pain of a violent death. Even when saving her life, #409 does so by forcing Gwen to endure a painful ordeal while not showing even a minuscule amount of guilt. They don’t seem to hate humanity, but they don’t care about it either. That’s in some ways more horrifying, seeing how they alter reality.

[[AC: ''VideoGame/{{Touhou}}'']]
* ''FanFic/ImperfectMetamorphosis'':
** Rumia's SuperPoweredEvilSide, otherwise known as [[spoiler:the Shadow Youkai]], is WalkingWasteland personified; a single touch can result in death, and even the most powerful denizens of Gensokyo are not completely immune from its corruptive power. Near-impossible to kill, its vanquishers could only [[SealedEvilInACan seal it]] in a weakened from and strip it of its memories, but that didn't last long. Later events reveal it's [[spoiler:a FallenAngel.]]
** Yuuka Kazami is [[TheDreaded intensely feared by everyone]], [[RealityWarper Yukari's powers]] are ineffective against her, no-one has the slightest clue what she is, and she laughs off everything thrown at her. Even after assembling a team of godly powerhouses equipped with the most potent weapons in Yukari's arsenal the battle against her swiftly goes tits up, in the process revealing her nature as [[spoiler:a weakened Outer God.]]
* Yukari Yakumo's depiction in ''FanFic/MaidensIllusionaryFuneral''. She doesn't project her gaps, she ''is'' her gaps, a formless mass of darkness and eyes [[AFormYouAreComfortableWith masquerading as a human woman]]. She's so powerful that nothing in the story can stop her; getting '''bisected''' is less than an inconvenience, and she's the only one that can get close to Yuyuko without being killed, suggesting that she's beyond death.

[[AC: ''TabletopGame/{{Warhammer 40000}}'']]
* The Plot Hole from ''Fanfic/{{PRIMARCHS}}''. A living gestalt of all the plot holes accumulated in fiction that wants to eat the universe until only it remains.
* ''TabletopGame/{{Warhammer 40000}}'' has no shortage of this trope, but ''FanFic/TheShapeOfTheNightmareToCome'' adds even more. The New Devourer is an unstoppable tide of death and hunger that eats ''a third of all life in the galaxy'' before inexplicably leaving, with hints that it ate ''everything'' in another galaxy. The Star Father is the GodEmperor made manifest in the Warp, the [[LawfulEvil Chaos God of Order]] that removes all thought and emotion in its subjects, and is so powerful that it took '''all four''' of the other Chaos Gods attacking it at once to prevent it from crushing them. Almost nothing is known of the Ophilim Kiasoz except that it causes entire star systems to ''cease to exist'' simply by being near them. And then there's the Nex, an UltimateEvil at the (maybe) heart of the Warp. To GoMadFromTheRevelation is the ''least'' terrible thing that can happen to you if you learn '''anything''' about it beyond its name.
* ''FanFic/TheAgeOfDusk'', sequel to ''Nightmare to Come'', adds Draziin-maton, apparently Pre-Fall Eldar constructs possessed by... something, from layers of Warp so deep that their presence alone turns ''Daemons'' into unfanthomable, mindless chaos. WordOfGod says the chaos gods themselves are only aspects of the Nex.

[[AC: ''WesternAnimation/{{WITCH}}'']]
* ''Fanfic/{{Ripples}}'' has A'lek'hol'an, the entity that Will/Van makes a [[DealWithTheDevil deal]] with during a near-death experience. The last of TheOldGods, Will isn't able to even remotely grasp his true form on the spirit realm, and in Meridian he takes the form of a [[GeniusLoci sentient swamp]], which is where the cult that worships him is located. He's also insanely powerful, as he's able to [[BalefulPolymorph completely change Will's body]] and enhance her powers, seemingly at a whim.

[[AC: ''Literature/{{Worm}}'']]
* In ''Fanfic/{{Propagation}}'' a gigantic, glowing, semi-transparent blue mass of tendrils, hands, and faces manifests at Winslow High due to Eden's core being part of Taylor's Trigger. [[spoiler: It is Taylor's true form.]]

[[AC: ''Anime/YuGiOh5ds'']]
* ''FanFic/MyDarkKing'' has the King of the Underworld, who takes it to the logical extreme and is worse than in the anime. It can spawn lesser Earthbound Gods from its body, and according to [[TookALevelInBadass Judai]], it arrived on Earth [[PhlebotinumKilledTheDinosaurs 65 million years ago]]. It gets into a fight with the Sengenma, as well.
** It is actually part of an entire ''species'' of extraterrestrial abominations, which Judai calls Coisichean Dorchadas (Gaelic for "darkness walkers"). Such members of the race include [[Anime/YuGiOhGX Darkness]], [[Anime/YuGiOh Zorc, and the Great Leviathan]].

----

to:

{{Eldritch Abomination}}s in FanFiction.

----

[[AC: ''Literature/ASongOfIceAndFire'']]
* ''FanFic/PurpleDays'': [[ZombieApocalypse The Long Night and the White Walkers]]. [[GroundhogPeggySue The Purple]] as well. The monstrosity in Stygai, whatever it is, also qualifies as this. Joffrey and Sansa consider that they ''themselves'' are turning into this in late loops.

[[AC: ''WesternAnimation/AvatarTheLastAirbender'']]
* ''FanFic/TheWorldWithoutTheWar'' has [[spoiler: the Four Elemental Beasts, who were created by the World Spirit before it took notice of humanity's existence. Their "logic" is similar to that of the Avatar, and when the Phoenix, the Beast of Fire, [[SealedEvilInACan escapes]], the other three Beasts will awaken, they would destroy civilization. Because that's the only way they can communicate with humans]].
* In the AlternateUniverseFic ''FanFic/{{Embers}}'', quite a few of the more dangerous spirits are either this or an AnimalisticAbomination.

[[AC: ''Manga/{{Bleach}}'']]
* ''FanFic/HammeredDown'' portrays the Vasto Lorde-class Espada as AnthropomorphicPersonification(s).

[[AC: ''WesternAnimation/CodenameKidsNextDoor'']]
* Invoked/parodied in ''[[http://www.fanfiction.net/s/4657412/1/Operation_There_Is_No_Operation Operation: There Is No Operation]]'' where we meet the Galactic Kids Next Door, some of which are eldritch abominations with unpronounceable names. Since they are minors, they only induce temporary insanity in other species who see them and only with specific intervals, so as long as you remember to blink at the right time, you are fine. [[MarsNeedsWomen Oh, and one of them wants to date Nigel Uno.]]

[[AC: CrossOver]]
* ''Fanfic/LostTalesOfFantasia'' has the inhabitants of [[WesternAnimation/AliceInWonderland Wonderland]], which are described as demonic creatures of nightmares. Wonderland itself is an EldritchLocation that is said to be {{Hell}}. The two beings we see that come from it, [[AdaptationalVillainy Alice]] and [[WesternAnimation/TheAdventuresOfIchabodAndMrToad the Headless Horseman]], are definitely [[HumanoidAbomination Humanoid Abominations]]. [[WesternAnimation/{{Fantasia}} Chernabog]] is also hinted at.
* ''Fanfic/ChildrenOfAnElderGod'' mixes ''Anime/NeonGenesisEvangelion'' with the Franchise/CthulhuMythos. The Children have to fight the Elder Gods and the Great Old Ones, and every time they kill one of them, they absorb their power. At the end, [[spoiler: Shinji, Asuka and their teammates have become Eldritch Abominations and leave human society forever because everyone is frightened of them.]]
* ''Fanfic/ChildOfTheStorm'' mentions the Outsiders from ''Literature/TheDresdenFiles''. It also has the Elder God of Chaos and Black Magic Chthon, who spends most of the book masterminding his return through the Darkhold, ''the'' TomeOfEldritchLore, described as being indestructible and 'a brother to entropy'. His mere voice makes reality scream and when he finally succeeds, the presence of a mere ''fragment'' of him on the mortal plane starts twisting reality inside-out, and if he emerges in full, he'll destroy the universe.
** The N'Garai and the Mabdhara, Chthon's heralds and their generals, qualify as a smaller scale version of this, with the latter being able to manipulate chaos to disperse pretty much any magical attack thrown at them, to the point where one feels comfortable ignoring Wanda Maximoff of all people. [[ColonyDrop She makes it regret that decision.]]
** Dormammu, Surtur, Shuma-Gorath, and Lucifer all qualify, being mentioned as problems that Doctor Strange has to deal with.
** The Endless qualify as a fairly benevolent (mostly) version of this; however, it must not be forgotten that these are indescribably ancient beings that date back to the very beginning of the universe, or may even predate it entirely, that appear differently to every single separate observer, can do with reality pretty much what they please, and operate on an entirely different moral framework even to gods, let alone mortals.
** The Phoenix a.k.a. Destruction is a particular example: on the physical plane, She has no specific form, unlike Her siblings, taking hosts, restoring or destroying worlds, making such decisions on an incomprehensible logic, being explicitly described by Loki as more of a force of nature than anything else. Loki describes Her as a being without any concept of collateral damage, restraint, or middle gears in general, taking hosts as a MoralityChain. Oh, and she can play with reality with consummate ease - when possessing [[spoiler: Harry]], instead of simply standing up, She rearranges reality so that he's stood up, [[NotSoDifferent in the exact same way that Chthon does several chapters later.]] Even a small fragment of her power isn't meant to touch the world in one place for very long, for fear of burning a hole in the universe and providing a beacon for yet more examples of this trope. More to the point, She's even more powerful than he is; when the Darkhold - semi-sentient utterly indestructible ultimate TomeOfEldritchLore - senses a mere ''whisper'' of her power, it starts literally trembling in fear.
*** And that's when she's in one of Her benevolent/justifiably outraged moods (what with [[spoiler: having merged with Lily Potter, Harry's mother]]). The Dark Phoenix is described as all that amoral volatility combined with human darkness, and is ''even worse'', something that Doctor Strange, who fights examples of this trope for a living, describes as 'a horror beyond words'.
*** This description is entirely justified, since the last Dark Phoenix, [[spoiler: Surtur]], destroyed ''an entire galaxy'' before it was stopped, also creating the Great Dragons (think Smaug, but worse), transforming defectors into its seven 'Great Captains', each of which is ''at least'' a PhysicalGod and an example in their own right (one of them is Jormungand, father of dragons, who even when relatively weak, was only beaten when Thor ''threw him into a neutron star''), transforming the spirits of its dead enemies into PersonOfMassDestruction scale minions, getting more powerful whenever it was fought... And even when it was defeated, even then, it was impossible to kill, so the Alliance against it had to empower a Skyfather level champion with a specially enchanted blade made of Uru and Vibranium, ''specifically designed'' to NoSell its Phoenix fire, ''just to distract it for long enough for them to seal it away.'' And ''even then'', they could [[SealedEvilInACan only imprison it for a million years]] in a cosmic scale multi-dimensional magical prison that encompasses entire worlds [[spoiler: (it's Yggdrasil)]], which simultaneously keeps it locked away, siphons off its power to strengthen the prison/empower the Warden, and which ''still'' occasionally becomes a LeakingCanOfEvil.
* ''Fanfic/LastChildOfKrypton'': This story includes eldritch beings of both universes: the Angels (giant alien beings who display a myriad of shapes and defy the laws of physics) and [[spoiler:the New Gods. Most prominently, evil god Darkseid.]]
* ''Fanfic/SOE2LoneHeirOfKrypton'': Asuka fights humongous alien monsters known as Angels, and during an arc story she also faces [[spoiler:the New Gods of Apokolips.]]
* ''Fanfic/ThousandShinji'' mixes ''Anime/NeonGenesisEvangelion'' with ''TabletopGame/{{Warhammer 40000}}''. The Children become worshippers of the Chaos Gods and they slowly beging to change until [[spoiler:they ascend and become the New Chaos Gods.]] At the very least they are more benevolent than their predecesors.
* In ''Series/BuffyTheVampireSlayer''/''ComicBook/{{Supergirl}}'' crossover ''Fanfic/TheVampireOfSteel'', M'Nagaleh, a cosmic horror summoned by a mob of vampires checks most of Lovecraftian traits: Completely alien thought processes? Check. Humongous? Check. Gelatinous? Check. Terrifyingly powerful? Check. Tentacles? Double check. It's even called "a glob of whatever-it-was".
-->An aperture was opening in the very air above them, and something was tumbling out. Something glistening, gelatinous, tentacled, eyed, and alive. It settled around the towers, but there was more of it coming out.
* ''[[http://www.fanfiction.net/s/6260492/1/Happy_Families_Are_All_Alike Happy Families Are All Alike]]'' has mentioned unliving beings from beyond the veil of death (which Orochimaru apparently enjoys killing) and the Kyuubi has displayed unnerving powers, which in the 7th chapter escalated to full-on mind-shattering EldritchAbomination status.
* ''FanFic/PersonalityConflicts'' depicts [[EnemyWithin the Green Ranger]] and Nyghtmayr as this.
* In the ''WesternAnimation/MyLittlePonyFriendshipIsMagic''/''Series/DoctorWho'' crossover ''FanFic/TimeLordsAndTerror'', The Smooze, the infamous BlobMonster from the [[WesternAnimation/MyLittlePonyTheMovie1986 G1 theatrical movie]], is re-imagined as the S’Müz, an [[OmnicidalManiac omnicidal]] cloud of [[EnergyBeings psychokinetic energy]] whose voice alone is enough to incapacitate mortals with its innate hideousness, and who will be satisfied with nothing short of absorbing all the psychokinetic energy (AKA 'life energy') in not just the universe, but the ''multiverse''. This thing is essentially an actively malevolent ApocalypseHow/ClassZ Event! The only way the non-Time Lord protagonists are able to withstand ''seeing'' the monstrosity with sanity intact is with the help of [[ReversePolarity inverted perception filters]]. It doesn't help that the author can convincingly write in the CosmicHorrorStory style, with in-depth descriptions of the alien and often contradictory aspects of the abomination, nor that it was deliberately written to channel [[VideoGame/MassEffect1 Sovereign]].
* The ''Manga/RanmaOneHalf''/''Anime/SailorMoon'' fic ''FanFic/TheDarkLordsOfNerima'' has something called Unit Zero. We know next to nothing about it, except that it has enormous power and if given the chance, will attack Sailor Moon via some unknown means. [[spoiler:Subverted, Unit Zero is actually a clone of Sailor Moon. The sensed power is that of Serenity's bloodline, and the emptiness is due to the girl's lack of a Star Seed. The only cure for that is to rip out the original's Star Seed and put it in herself, which, thanks to Unit Zero's conditioning, will leave the power of the Silver Crystal in the hands of the antagonists. Whatever the case, she isn't even a HumanoidAbomination, and is most certainly a WoobieDestroyerOfWorlds.]]
** A more straight example comes in the form of the Nameless One, a malevolent entity that was sealed away by previous generations of Senshi, but can still manifest its power through use of minions that heed its call. It has enough power to break Sailor Moon's seal on the Dark Kingdom, [[spoiler: and when it manages to open enough of a rift to attack directly, it takes Sailor Chibi-Moon, the rest of the Sailor Senshi, sans Saturn, the power of Helios and his sister Melinoe and power of all the dreams and nightmares of the human race channeled through the Golden Crystal to drive it back and seal the rift]].
* In ''Fanfic/RyuugisTheMasterOfDeath'', Literature/HarryPotter and his companion both appear as Eldritch Abominations when they appear in [[Literature/TheDresdenFiles the Dresden universe]] because according to his companion, the universe requires they leave behind their Shapes and borrow new ones from [[EldritchLocation a place where nothing exists]] until they leave. In his words, "There's quite a lot that doesn't exist. We didn't exist until a moment ago." As a result, to Dresden, most of his encounters with Harry are distinctly unnerving, because he thinks (and is technically right) that this twinkly eyed old man is one of the most terrifying entities ever to cross the boundaries of reality. The facts that parts of Harry's magic are ''literally impossible'' by Dresden Files standards, and that he usually appears through a gigantic train that seems to happily park in midair, doesn't help. Then Dresden winds up ''literally'' [[DidWeJustHaveTeaWithCthulhu having tea with Cthulhu.]]
* Computer viruses and malware manifest as such in ''FanFic/TheInfiniteLoops''. There's also the Hackers, which are inspired by Lovecraft. And then there's the viral composite consciousness that caused The Crash, an event which resulted in the total RetGone of a universe.
* The supercrossover military fanfiction ''FanFic/TheTerminatorsArmyOfLegend'' features Archdemon Deitus the Lifehunter, the fallen, immortal son of fallen Archangels Messorem and Vitam, the literal incarnations of Death and Life respectively. The Lifehunter has many forms he can take, including projecting himself and his image to others, through dreams or a waking state, and he wields unimaginable power, even while bound to his throne in Purgatory through the mystical and incomprehensible ''Chains of Eternity''. One of his favorite past times is tormenting mortals, angels, and demons alike, and he's strongly hinted to be the [[TheManBehindTheMan puppet master]] throughout the entire series. Even the common form he takes (and may be his true form if the appearance of his young son is any indicator) is that of a massive satyr with slick, oily-black tentacles sprouting from his body which he uses to ''sap the life force from his victims to feed his own immortality'', turning them into grisly, dehydrated husks in the process, thus granting him his nickname.
* [[WesternAnimation/MyLittlePonyFriendshipIsMagic My Littly Pony]]/VideoGame/{{Minecraft}} Crossover, ''FanFic/MyLittleMinecraftAtTheEnd'' gives us several examples. In order of increasing power and nastiness, they are:
** [[spoiler:[[HumanoidAbomination The Miner himself]]]]. He resembles nothing that the ponies have ever seen before, and his powers defy all the laws of nature as they understand them. They even speculate that he has to physically override the laws of nature surrounding their own world in order to use his powers on them, essentially rewriting pieces of their world to work by his own rules instead. Fortunately, he is more intent of keeping his head down and experiencing the sensations of the new dimension he finds himself in than causing any lasting harm.
** [[spoiler: Brimstone, the Fallen King, is the disembodied consciousness of the former ruler of the Crafters, essentially an entire race of Minecraft players. Though lacking a physical form, he can BodySurf seemingly at will, inflict various mental tricks including [[LaserGuidedAmnesia memory alteration]], GrandTheftMe, extremely vivid hallucinations, crippling fear, and MindRape, enhance ponies to super-equine levels of strength, speed, and perception, or apparently disintegrate them outright. Fortunately, he stands decidedly against the story's Bid Bad (see below). Unfortunately, his mental state can be accurately described as "a disembodied mass of pure hate and rage" directed towards said Big Bad, and he accordingly does not play well with others.]]
** [[VideoGame/{{Minecraft}} Herobrine]]. The Void Fog found near the bottoms of Minecraft worlds is apparently an extension of his essence, and his first act upon manifesting in Equestria is to use it to spawn [[WalkingWasteland the Wither]]. He can mask himself from mortal detection, create powerful storms at will, enable hostile Mobs to spawn from any dark space over a large area ([[spoiler: at least the size of [[OhCrap Ponyville and the nearby Guard camp]]]]), created inter-dimensional portals wherever he wants and easily gain the upper hand against [[PhysicalGod Princess Luna]] ''[[DreamWeaver inside of a dreamscape]]''. He seeks to [[spoiler: use the Elements to unseal the rest of his power, and will then likely [[OmnicidalManiac destroy all civilization on the planet]].]]
** [[MadGod Era'Doth]]. [[spoiler: It was the source of the Crafters their powers, and later [[ApocalypseHow annihilated them entirely]], apparently only sparing what was left of their king because it was unaware that there even ''was'' anything left. Sometime afterwards, it was somehow torn to pieces, and those pieces were bound in chains of magical light and sealed in extra-dimensional prisons. During the events of the story, its severed head escapes, still wrapped in the chain, and takes the name Herobrine.]]
* ''[[Fanfic/GuardiansWizardsAndKungFuFighters Guardians, Wizards, and Kung-Fu Fighters]]'' has the Cavalcade of Horrors, the entities living in the depths of the Shadow Realm, which are described as being masses of claws and tentacles, with hides that shift between feathers and scales, and too many eyes. And then there's [[UltimateEvil whatever the hell]] lives below them at the very bottom of the Shadow Realm, which they serve and is described as being god-like.
* ''Fanfic/TheBridge'':
** Grand King Ghidorah is presented as one. He only looks like a three-headed golden dragon, but is something so alien in biology that calling him one is a serious understatement. He's also so impossibly ancient that he was a teenager when he and his brother wiped out the dinosaurs.
** The Nexuses of Magic [[spoiler:Bagan, Harmony, and Grogar]] are presented this, with WordOfGod constantly stressing that while they ''resemble'' [[spoiler:a dragon, a pony, and a goat]], they're ''not''. They're just primordial entities that ''look'' like them. They're also so immensely powerful that Grand King Ghidorah is zero match for any of them, even when they're only at 30 percent of their full power and a rampage by one of them is perceived by modern humans as having been a natural disaster as they simply couldn't comprehend that something that strong could actually exist. [[spoiler:Thankfully, Harmony is [[GodIsGood completely benevolent]] and opposing the other two.]]
** [[spoiler:Celestia and Luna]] could be considered lower tier ones, as [[spoiler:they're actually pieces of Harmony's power given life.]]
* Literature/HarryPotter in ''[[https://www.fanfiction.net/s/9512698/17/Master-of-Death-and-What-it-Means Master of Death and What it Means]]'' only appears human because he chooses to. When the Avengers catch a glimpse of his form (despite being warned not to look), it's described as impossibly large and infinite, simultaneously the absence of light and the radiance of a thousand suns, sometimes winged and sometimes horned, with the stardust of universes dripping between it's teeth.
* ''Fanfic/BiomassEffect'': in addition to the things we see in VideoGame/MassEffect and Videogame/{{Prototype}} we have the things created by the "Children of Saleon" virus created by [[MadScientist Dr. Heart]], for reference, this is a virus that is both [[TooSpicyForYogSothoth too spicy for Blacklight]] to consume, can incorporate inorganic matter into its form, and according to Blacklight which can rewrite its DNA however it wants, [[StarfishAliens makes zero biological sense]], examples include:
** Hearts mutant Varren, one of which devours the leftovers from his experiments by vomiting its stomach inside out, wrapping it around its food and using mucus to make it stick before pulling it back in, another, one Heart uses as a LabPet gets [[MercyKill killed]] killed by Blacklight along with the others [[FromASingleCell only to come back as an even bigger, more monstrous version when one of its claws gets chopped off via the door to Hearts escape pod.]] Later, Heart decides to improve it further by giving it [[RoBeast cybernetic implants.]]
** Later, when Heart [[MyGodWhatHaveIDone finally realizes he went too far.]] he tries to destroy his lab via a nuke. When a group of mercs he hired earlier check to see what happened [[spoiler: they find a radioactive monster made from Heart, his pet cyber-varren and the rest of the biomass in the lab.]]
** The Mother Husk, an amphibious, huskified, Kaiju sized amalgam of Saleon virus infused biomass, spaceship wreckage and anything else it assimilated after crash landing in Khar'shans oceans. When Blacklight sends its own giant biomass creature to stop it, the Batarian navy watching describe it as something between a Kaiju Battle and two [[EldritchAbomination cosmic horrors]] duking it out.
** Later the Batarians end up trying to nuke the Mother Husk, [[NiceJobBreakingItHero not only does that make it more powerful, it splatters most of their equipment with Saleon virus biomass]] causing their vehicles to turn into [[MechanicalAbomination mechanical abominations.]]
* In the MagicalGirl CrisisCrossover ''FanFic/ShatteredSkiesTheMorningLights'', [[BigBad Joker]] unleashes [[NoNameGiven "the entity"]], an enormous, unkillable SpaceTimeEater from [[OutsideContextProblem far beyond the boundaries]] of the story's [[TheMultiverse Multiverse]]. Within seconds, "the entity" completely annihilates every post-Go Princess [[Franchise/PrettyCure Precure]] continuity, and devours the futures of all the rest, causing the surviving timelines to collapse together in a catastrophic TimeCrash.
* ''Fanfic/CitadelOfTheHeart'':
** ''Truth and Ideals'' has the infamous Chargestone Cave arc, a plot point planned from the very conception of the story, ending with the climatic showdown against [=MissingNo.=]. Not any of the versions it appears as in Gen I, mind you, but rather, ''[[https://www.deviantart.com/mf217/art/MissingNo-Truth-and-Ideals-606777333 all five versions combined into one singular form of madness]]''.
** For the continuity as a whole, we have [[https://www.deviantart.com/mf217/art/Darigus-the-Sane-760073503 Darigus]] and his primordial father known as [[https://www.deviantart.com/mf217/art/Zenith-Neo-Ultimorian-Canon-584297730 Zenith]].
** White Rabbit truly takes the cake by not having the cosmic element as the two above, but also has a subtlety they lack; White Rabbit normally takes on a variation of its regular form, ranging from [[https://www.deviantart.com/mf217/art/--561652193 small and diminutive]] in stature, to [[https://www.deviantart.com/mf217/art/NOT-SO-FAST-618519709 large and lanky]]. Then there's the appearance it takes [[https://www.deviantart.com/mf217/art/White-Rabbit-CORE-796292505 when it completely begins to suffer an overload]], in which its body tears apart, its head splits clean open and reveals a sphere capable of firing a laser beam, and its wings having completely melted off and reattached as veins. White Rabbit's more Earthly origins leads one to ask many things, but nobody is quite sure as to why exactly White Rabbit's left arm ''[[BodyHorror functions as an esophagus and jaws for fingers]]''.
* ''Fanfic/TheLastDaughter'' has the Endbringers, sentient mountains of organic tissue surrounding a core.
* In ''Fanfic/AvengerOfSteel'', this is how [[spoiler: Trigon]] is presented, being an entity from a dimensional plane above the normal multiverse that is so incomprehensible and powerful that [[BrownNote seeing him would drive most mortals insane]], and a full manifestation by him on Earth would shatter reality. Also, he's literally MadeOfEvil, as after others of his kind cast him into the Heart of Darkness (a dimension that is said to be the source of all evil energies), he ''absorbed it all''.
* While many demons in ''Fanfic/RemnantInferisDOOM'' are horrific to look at, most of them don't go too far beyond either AnimalisticAbomination or HumanoidAbomination territory. The Shadowlord that the first Icon of Sin fought in Hell's beginnings, however, falls squarely into this trope. It was described as an amorphous mass of phallic tentacles and reptilian maws that was gargantuan in size.

[[AC: ''Franchise/{{Digimon}}'']]
* The [[ArcVillain Nightmare virus]] from the ''FanFic/TamersForeverSeries'', which later evolves into a HumanoidAbomination, once it assumes Takato's Image.

[[AC: ''Film/DoctorSleep'']]
* In ''FanFic/TheResurrectionOfRose'', the [[Film/TheShining Overlook Hotel]] is a full-fledged entity that drives the inhabitants insane climaxing in their deaths from murder-suicide. After the events of the film, [[BigBad Rose the Hat]] aims to use it to make herself the most powerful Shiner in existence.

[[AC: ''Series/DoctorWho'']]
* [[https://www.fanfiction.net/s/9827920/1/The-Door-of-the-Demon The Door of the Demon]] has SealedEvilInACan which is [[NothingIsScarier unseen]] except for one of its claw. It is "said to have a face so hideous that anybody who saw it would [[EyeScream tear their eyes out]] rather then see it again."
** Later in this series is [[https://www.fanfiction.net/s/10170307/1/The-Purple-Star The Purple Star]], showing an "Unverse" which is used to imprison such creatures.
* ''Fanfic/TheLastGreatTimeWar'' reveals the the nature and identities of the horrors mentioned by the Tenth Doctor in The End of Time.

[[AC: ''WesternAnimation/TheFairlyOddParents'']]
* In ''FanFic/NeverHadAFriendLikeMe'', it turns out that [[spoiler:Bob the boil on Elmer's face]] is one. He is trapped in a another universe, one where the rules are vastly different, and can only have limited contact with the main universe while in that state. Then Timmy makes just the wrong wish and unleashes [[spoiler:Bob from the boil]], which leads to reality warping around him in a growing orb of influence at his mere presence. And he fully intends to take over and remake the world into how he'd like it.

[[AC: ''VideoGame/FreeSpace'']]
* The fan mod ''VideoGame/BluePlanet'' applies this to the Shivans (who were merely StarfishAliens in the canon games... as far as anyone knows). Shivans in the BP-verse are [[spoiler:implied to be tied to the very fabric of reality, and are eternal, infinite, and (as a whole) invincible.]] They are also described as being "as far above humanity as humanity is above a protein chain". Much of exactly ''what'' they are is obscured through some very strange TechnoBabble, for example, they were described as not being "made" but rather "calculated". Being in contact for a brief few minutes with the Shivan consciousness contains a real risk of the human going completely insane from the experience, and several times Ken deliberately cuts off contact to certain parts of it to protect the player's mental stability.

[[AC: ''Anime/MobileSuitGundamIronBloodedOrphans'']]
* ''[[https://www.fanfiction.net/s/12484040/1/The-Devil-s-Reprisal The Devil's Reprisal]]'' has heavy shades of this on several counts.
* The [[MechanicalAbomination Hashmal]] is awoken early by [[spoiler: Teiwaz]] during a failed hit against the main characters, resulting in a somewhat terrifying Lovecraftian entrance. [[VonNeumannMachine It can self replicate to an unknown extent]].
* All Gundams are this, to a degree.

[[AC: ''Franchise/HarryPotter'']]
* ''[[http://www.fanfiction.net/s/9172846/1/Deathly-Hallowed Deathly Hallowed]]'' portrays [[TheGrimReaper Death]] as this. Lily summons it to [[DealWithTheDevil make a bargain with it]]. She'll return it's cloak in exchange for Death protecting her son. However, even after using a ritual to allow it a form, it's described as having "Far too many hands, too many eyes, too many mouths" and can only seem to speak in a almost [[MindRape mind-raping]] form of telepathy or BlackSpeech.
** Perhaps worse are all the Eldritch Abominations that seem to be after both Harry and Death.
* Rabbit in ''[[https://www.fanfiction.net/s/9911469/1/Lily-and-the-Art-of-Being-Sisyphus Lily and the Art of Being Sisyphus]]''. Of course it's not really a rabbit but some cosmic horror from beyond reality that Lily has forced into the shape of a rabbit when she pulls it out of a hat and she fears that if she leaves it unattended, it will eat Scotland.
* The [[OurGodsAreDifferent Perennials]] in FanFic/KingOfKingsRulingOverRulers. A species of ultra-dimensional beings which are the physical and metaphysical embodiments of what creation itself acknowledges as "true concepts". It is impossible to kill a Perennial, and the first attempt to do so both failed and succeeded. The Sacred Twelve (aka Progenitors) are known for assuming...uncanny shapes.
** The being known as Ayavan [[TheDreaded is regarded as this]] by the Perennials themselves, to the point where they waged an entire war in an attempt at destroying him. [[spoiler: They failed.]]
* Mort in ''[[https://www.fanfiction.net/s/12754810/1/Monsterous Monsterous]]'' is a being of smoke and shadows that can grow a hardened spiked carapace in an instant, moves on four legs or two as it feels appropriate, has a tail that ends in three prehensile claws, and lacks any sort of face. On top of this it's shown to change size from a large horse to an [[Literature/TheLordOfTheRings Oliphant]] and anywhere in between along with casually changing it's skeletal structure (it once "flexed the bones" of its skull out of boredom) and is capable of using magic. [[spoiler:Oh and [[WasOnceAMan it used to be Harry Potter]].]]

[[AC: ''WesternAnimation/InvaderZim'']]
* [[https://archiveofourown.org/works/19213330 This]] fanfic features an entity called Shlog'ec'mer, a massive tentacled blob that is capable of disguising its form (in the story's present, it takes on the appearance of a carnival's haunted house attraction), and which claims to be from beyond the universe as it's understood by three-dimensional beings. It travels between worlds, ensnaring victims who it places in {{Lotus Eater Machine}}s that trap them in their [[YourWorstNightmare worst nightmares]] so that it can [[EmotionEater feed on their fear]]. [[spoiler: It does this to Gaz, Zim, and Dib, but when it tries on [[CloudCuckoolander GIR]], it ends up [[TooSpicyForYogSothoth going insane and dying]].]]

[[AC: ''WesternAnimation/JackieChanAdventures'']]
* ''FanFic/{{Webwork}}'' has the entities that [[CosmicChessGame sit in control]] of the BalanceBetweenGoodAndEvil, referred to only as IT (evil) and OTHER (good). They've apparently existed since at least the dawn of time (or possibly even earlier), are never properly described, and are so powerful that just being in IT's presence ''terrifies'' Tarakudo.
* In ''FanFic/AgesOfShadow'', [[FallenHero Jade]] evolves into one over the course of the [[TimeAbyss countless centuries]] she spends [[SealedEvilInACan locked away]] in the Shadow Realm. Having already become an unstoppable, immortal PhysicalGod (which is what required her being sealed away in the first place), she slowly warps her body into a new form in order to better adapt to the nature of the Realm (and just as something to do) -- she gives herself a tail, turns her now pointless legs into extra arms, and turns her hair into tentacles, among other things. And then she encounters an [[AlternateUniverse alternate Earth]], where she gets her own cult, which worships her for thousands of years and seeks to unleash her to conquer the world. All this combined with her [[GoMadFromTheIsolation isolation-induced madness]] giving her borderline BlueAndOrangeMorality, and she's really hitting all the points of this trope.

[[AC: ''Manga/KatekyoHitmanReborn'']]
* ''[[http://archiveofourown.org/works/5562169 Dead-Eyed Tsuna]]'' has the eldritch abomination be [[spoiler: the protagonist Tsuna himself]] by having ash leak out of his wounds and heal them.

[[AC: ''WesternAnimation/KimPossible'']]
* ''FanFic/BloodBondBloodOmenSeries'' culminates in [[spoiler:a fight against [[NamesToRunAwayFromReallyFast the Unshaper]] that is using the Go family as its avatars so it can swallow the Earth whole]].

[[AC: ''Franchise/KingdomHearts'']]
* ''FanFic/KingdomHeartsIIITheHeartsGreatestWeapon'' has [[spoiler:Darkness, a massive creature who spawned the Heartless and, by extension, the Nobodies, and took over Kingdom Hearts itself.]]
* ''[[https://www.fanfiction.net/s/5740264/1/Fill-the-Moon Fill the Moon]]'':
** Hollowmoon, a colossal creature that is the AnthropomorphicPersonification of the darkness within Kingdom Hearts. It's implied that it [[DrivenToSuicide drove the protagonist to suicide]].
** There's also the [[spoiler:AnthropomorphicPersonification of Kingdom Hearts. Hollowmoon is her brother, and they're implied to have an [[BrotherSisterIncest incestuous relationship]].]]

[[AC: ''Franchise/TheLegendOfZelda'']]
* In ''FanFic/LegendOfZeldaSacredReliquary'', one stalks the streets of Hyrule Castle Town at night. [[spoiler: Its true form is apparently Dark Link.]]
* In the ''FanFic/BoundDestiniesTrilogy'', [[VideoGame/TheLegendOfZeldaMajorasMask Majora]] is even more eldritch than in canon, subjecting Link to TheCorruption in ''Blood and Spirit''. WordOfGod establishes Majora as the Terminian counterpart to [[GodOfEvil Demise]].

[[AC: ''Franchise/LesMiserables'']]
* The expanded FanVerse of ''FanFic/ParisBurning'' includes several of these, the most prominent of which resides under the Antarctic ice and seems to be implementing an AssimilationPlot. Others include the broken giant that resides in the Grand Canyon, the northern ice that has a lock on pretty much all of Canada, things moving underground in the east, Aberdeen's father, and the sighing mountains. They all hate Antarctica because it is the runt of the litter.

[[AC: ''WesternAnimation/TheLoudHouse'']]
* In ''Fanfic/{{Revival}}'', [[BigBad Maya Lottie]] is in truth the voice of the Outer Gods Nyarlathotep who manipulates Lana into reading the Necronomicon as a means of freeing the other Outer Gods. Nyarlathotep mainly appears as a 12-year-old girl due to mocking her slave over him killing his daughter and his family.

[[AC: ''Franchise/MassEffect'']]
* The Reapers were this already, but in ''[[http://www.fanfiction.net/s/5339492/1/Spectre Spectre]]'' Sovereign has taken it to new heights, all but [[MindRape mind raping]] Shepard on more than one occasion.
* The Reapers once again, in ''Fanfic/MassEffectEndOfDays'', where we get to observe the thoughts of [[spoiler: the Reaper-larvae from the Collector base as it gains consciousness. While the Reapers have yet to make a ''proper'' appearance]], they are shaping up to becoming fullblown Eldritch.
-->[[spoiler: '''It was ''magnificent''. The Entity moved towards the Light, and the Light grew ever larger, blowing away the darkness. A shape took form, and It saw Its [[AssimilationPlot new form]], and Its [[AscendToAHigherPlaneOfExistence previous world]] clearly. As starlight reflected on the waters' surface. The stars' light will not be extinguished. As long as They exist in the sky, starlight will remain on the water...'''\\
\\
'''...And [[ViciousCycle this]] is a thing which already was.''']]
* The Leviathans in ''Fanfic/OfSheepAndBattleChicken'' are so far beyond other life forms that they barely understand it, and even a single elder Leviathan is so powerful that the Reapers think committing hundreds or thousands of themselves against a single 'Old One' is an entirely appropriate response... and the odds of a Pyrrhic victory are all too likely.

[[AC: ''WesternAnimation/MyLittlePonyFriendshipIsMagic'']]
* The original VideoGame/GarrysMod Applejack model was so [[UncannyValley freaky]] that it was reinvented as [[https://www.youtube.com/watch?v=mL5-8R6Kklg Eppaljeck]], in the style of other [=GMod=] abominations (see below).
* In the early days of the fandom Celestia and Luna were [[AlternativeCharacterInterpretation interpreted]] as benevolent Abominations instead of "mere" {{Physical God}}desses, due to their [[ReallySevenHundredYearsOld incredible age]] (Luna is more frustrated that being imprisoned in the moon for a thousand years means she's a FishOutOfTemporalWater, rather than from ''[[AndIMustScream being imprisoned for a thousand years]]''), almost unmatched power, NonStandardCharacterDesign, and being [[GodEmperor worshiped as deities]] by their subjects with a combination of unquestioning obedience and paralyzing fear. However, after season 2 and the reveal of Discord (see below) that interpretation fell well into the minority.
** ''[[http://www.equestriadaily.com/2011/05/story-merely-mare.html Merely a Mare]]'' has Luna casually mention that she and her sister are more than ''four hundred '''million''''' years old, spending most of that time playing in the glaciers and lava flows of the planet respectively, and the mane six are continually reminded that the two are very much Other.
* [[CloudCuckooLander Pinkie]] [[GenkiGirl Pie]] is sometimes written as an [[HumanoidAbomination Equine Abomination]]. There is a high amount of supporting evidence, what with her tendency to [[OffscreenTeleportation appear wherever she wants whenever she wants]] (much to the horror of Rainbow Dash and Cranky Doodle), including in places that couldn't possibly be large enough, her mastery of {{Hammerspace}}, and her apparent MediumAwareness, things which are explicitly noted in the show as being weird and unexplainable. Though this can simply be due to Pinkie Pie being an extremely powerful reality warper or being a good Abomination
* [[GodOfChaos Discord]] is frequently written (most famously in the ''FanFic/PonyPOVSeries'') as [[AnthropomorphicPersonification the personification of chaos itself]], whose [[RealityWarper near-unlimited power]] stems from him being so fundamentally opposed to ''reality itself'' that they reject each other, allowing him to make pretzels out of physics, and is [[EvilCannotComprehendGood completely incapable of comprehending]] things that are remotely orderly or sane.
* ''Fanfic/EquestrianAllianceProjectOblivion'' features [[spoiler:Shub-Niggurath]], an Outer God of the Franchise/CthulhuMythos, as [[spoiler:the primary BigBad.]]
* In ''[[http://www.fimfiction.net/story/1451/6/The-Monster-Mash/Twilight-Sparkle%3A-The-Case-of-Wild-Clover-the-Warder Twilight Sparkle: The Case of Wild Clover]]'', the eldritch abomination [[spoiler:is you]].
* ''Fanfic/PonyPOVSeries'':
** [[spoiler:Discord's parents]] Entropy and Havoc, respectively the {{Anthropomorphic Personification}}s of Heat Death and Mass Hysteria. The former is so massive that her just ''rising'' from the ocean of chaos she calls home creates waves that could drown ''continents'', and if she merely ''says'' someone doesn't exist (at least, in her own realm), then they ''never did''. The latter is described as every fear that ever has, does, or ever will exist personified, and is so horrific to behold that just ''looking'' at him will leave a mortal pony incapable of sleeping for the rest of their days at ''best''. Entropy erasing Havoc from existence, then him ''willing himself back into it'' is equal to one member of a bickering couple shoving the other. Both have severe BlueAndOrangeMorality, Entropy viewing nothing as of value (even her own children) while Havoc's is described as, while valid, so alien its impossible for the personification of ''Wisdom'' to put it in words a mortal can comprehend. At one point Havoc [[DidWeJustHaveTeaWithCthulhu explains to Twilight]] that the reason he doesn't step in to stop Discord's actions is because just an Avatar of his emerging in the mortal realm would ''destroy Equestria's whole East Coast''. The Windigos are tiny pieces of Entropy as well. [[spoiler:And one of Entropy's mortal incarnations is ''Maud Pie''. And because of Her nature as an Elder, all Mauds are part of Entropy.]]
** [[spoiler:Celestia's parents]] are just as massive, powerful, and [[YouCannotGraspTheTrueForm indescribable]], but are among the kindest beings in existence, even stepping in and [[spoiler:saving the pony world from Havoc and Entropy's wrath when they were accidentally enraged]] and being in the presence of either is described as reassuring and pleasant. The Father of All Alicorns is stated to ''[[GeniusLoci be]]'' Pony Heaven. All four Elders are multiversal singularities, meaning every alternate version of them is merely another part of the same being.
** Discord's repeatedly cameoed cousin Ponythulu, who seems to be this trope played for laughs, as he's yet to do anything remotely evil, and actually seems downright ''[[DidWeJustHaveTeaWithCthulhu friendly]]''.
** [[SuperpoweredEvilSide Nightmares]] tend to have traits of this, but the "Super Nightmares" (who have managed to mutate somehow) fit it to a T. Nightmare [[spoiler:Whisper is a gigantic, vaguely dragon-like monstrosity with a burned and blackened hole in her chest and exposed with an undead foal inside]] due to [[spoiler:sucking all of Equestria's sins and evil into herself (trapping all those effected in a LotusEaterMachine or reducing them to a foal) and obtaining the Elder Horn.]] Nightmare Mirror is an equally huge MultiversalConqueror with wings covered in ''eyes'' who can [[spoiler:force the victim to witness the harshest truths about themselves]] if they look in them and is described as having a [[YouCannotGraspTheTrueForm constantly shapeshifting form.]] While [[spoiler:Nightmare Eclipse/Paradox]] has a lot of traits of one, she leans more towards being a [[HumanoidAbomination Equineoid Abomination]], though [[spoiler:one of her PsychoRangers, Nightmare Banneret (Spike's Nightmare) resembles one.]]
** By the time of the FinalBattle between Shining Armor and Makarov, [[spoiler:the latter has mutated from a mere [[HumanoidAbomination Equineoid Abomination]] into one of these; merely ''glimpsing'' its true form nearly causes Shining's mind to ''shut down''.]]
** The Shadows Who Make, Watch, and Rule, beings beyond even the Elders, who Celestia refuses to describe to anyone in-universe, since she knows it would cause them to GoMadFromTheRevelation. [[spoiler:They turn out to be [[HumansAreCthulhu the writers, readers, and Hasbro]], respectively.]]
** King Sombra is presented as one in the brief OriginsEpisode Alex Warlorn gave him after finally watching Season 3 -- he's the embodiment of the crystal ponies' collective fears, which they were tricked into purging from their hearts by one of Discord's cousins (who themselves count) in the belief that this would grant them further protection from Discord. Instead they got a monster whose every act was literally everything they ever feared would happen to them. [[FromBadToWorse And then]], [[ItCanThink he developed full sentience]]...
** As shown in a flashback episode to the FinalBattle of the Age of Myths (the G1 era), [[spoiler: there was Lilith, the First Witch and Queen of the Witches, the {{predecessor|villain}} to all the witches and warlocks from G1. While she was humanoid, she was also [[MadeOfEvil composed of pure evil magic]], and so strong she could have ''[[OmnicidalManiac drained the life from the whole world]]'' leaving nothing but dust and the {{living shadow}}s of people she'd reduced to mindless servants. Even after the G1 Mane Cast defeated her by draining all her power into the [[ArtifactOfDoom Alicorn Amulet]], she still survived and returned later as the Shadow Queen.]]
** There's also the Outer Concepts, the Draconequi's cousins. Ponythulhu is one of them (and the TokenGoodTeammate), and they're based off Lovecraft's work in design and theme. The most prominent member is Nyarlathotrot ([[spoiler:who serves as one of the main villains of the Rumors Arc]]), who is the personification of the combined darkness of the aforementioned Shadows Who Are and makes the Grim Dark Worlds for them. He's also [[HiveMind composed of one thousand different Avatars]], each no less him but also their individual entity. He's also the above mentioned King Sombra's ''father''. Other members of his family are Abandon (the Spirit of Sadomasochism), [[WesternAnimation/{{Coraline}} the Beldam]], Yog-Sothorse, [[MotherOfAThousandYoung Shub-Neighurath]], and their [[TopGod Elder]] Azerhorse. Also LovecraftLite, as they seem no stronger than the other genuinely benevolent deities and can be defeated by them, but they are certainly dangerous.
** [[spoiler:Nightmare Phobia]], the BigBad of the Chaos Verse (an official spinoff of the ''POV Series''), is made from [[spoiler:the remains of Nightmare Moon's essence]], and exists primarily in the collective subconscious of ponykind. And that's ''before'' she goes OneWingedAngel, at which point she [[spoiler:becomes a sentient void, which consumes Discord's pocket dimension and nearly emerges into the real world, which causes ''every living thing'' extreme pain]].
* From the same author, [[http://fav.me/d7vi0g9 My Little Pony G3 Pony Tales vs Hatred]]. The G3 Ponies are plagued by nightmares based off cruel things G3 haters say about the series. It turns out [[spoiler:the BigBad is one of these, taking the shape of a massive living storm shaped like a serpent ''literally'' as big as Ponyland itself and composed of the hatred and intolerance fans have for the G3 (Alexwarlorn often takes things like cliches or fandom reactions and uses them as inspiration for Cosmic Horror Stories). ]] However, [[spoiler:[[LovecraftLite the storm serpent is defeated]] by [[ThePowerOfLove the combined love and tolerance of all of Ponyland.]]]] It's better than it sounds.
* In ''Fanfic/UnderTheNorthernLights'', Luna's and Celestia's greatuncles and greataunts are described in a vision as "lights... sounds... patterns of magic in a black sphere that itched the brain and made the soul cry". They decided the laws of nature, seemingly on a whim. The only hostile one seems to be Discord, though, and his reality warping powers are presumably because he never agreed to what his siblings decided. The generation of their parents has some traits of eldritch abominations but are more like OurTitansAreDifferent, having motivations similar to mortal ungulates despite their ancient age, huge size, and inequine shape.
* ''Fanfic/TheStarsWillAidTheirEscape'' just cuts to the chase and outright crosses over with the Franchise/CthulhuMythos. Therefore, the BigBad is a stallion avatar of Nyarlathotep who hides his face behind a mask, as seeing it causes the viewer to go insane [[spoiler:which is what happens to Twilight]]; his {{Mooks}} are the Dark Young of Shub-Niggurath; and in true Mythos fashion, Trixie goes crazy after using the ''[[TomeOfEldritchLore Neighcronomicon]]'' and seeing the Young for the first time.
* ''Blog/{{Moonstuck}}'', [[VileVillainSaccharineShow of all works]], has [[spoiler:Discord]]. He uses an EnemyWithout and a personification of depression as his puppets, drastically distorts and at one point ''shatters'' the fourth wall and the ''narration'', and his speech and appearance are very similar to [[Anime/TengenToppaGurrenLagann the Anti-Spirals]] (probably deliberately, as the author is a fan).
* ''Fanfic/AFutureOfFriendshipAHistoryOfHate'': The [[BenevolentPrecursors Sentiox]] came into being [[TimeAbyss billions of years ago]] (and have since moved on to another plane of existence), came in a vast variety of forms (some rather normal-looking, some... not), and were powerful enough to create worlds... or in the case of [[BigBad Ruinate]], easily [[OmnicidalManiac destroy them]]. And speaking of Ruinate, he's one of the more otherworldly-looking Sentiox, being a large, vaguely frog-like creature, with three red eyes with cat-like slits, surrounded by (and possibly made of) a miasma of dark energy.
* Blog/ReadingRainbowverse: Parodied by the blog's version of the Shadowbolts. They're definitely eldritch, and they can only be seen by Lightning Dust... but they only irritate her instead of driving her mad and the worse thing they've done is draw a penis on her forehead.
* ''Fanfic/NightmaresAreTragic'': This is true not only of the villainous and extradimensional Night Shadows, but also of ''all'' Cosmic beings in our own Universe, including not only the Draconequii but even the Alicorns. The Alicorn Avatars in which Celestia and Luna incarnate are AFormYouAreComfortableWith.
* ''Fanfic/TheTearsOfGaia'':
** [[GreaterScopeVillain The Blight]] is a sentient [[TheCorruption corruption]] in the form of a black cloud that turns anything exposed to it into twisted, monstrous versions of themselves, driven by a desire to corrupt or kill others. And as shown in the opening CreationMyth, it was even capable of corrupting ''gods'', as it turned Discord and the other Draconequii from benevolent caretakers of the world into monsters out to destroy it.
** The Draconequii and Alicorns themselves, being nearly as old as the universe, with their physical forms being AFormYouAreComfortableWith designed to let them walk among their creations. Celestia and Luna are ''weak'' compared to their siblings, having given up their divinity to live directly with their subjects.
** The... ''thing'' in the dimensional rift where the Tears of Gaia were stored. We don't get a good look at it, but it's large enough that Twilight and her friends [[ThatsNoMoon mistake one of its eyes for a]] ''[[ThatsNoMoon moon]]'' initially, and the sound of its voice nearly deafens them.
* ''Fanfic/BlackQueenRedKing'' has at least three: [[spoiler: Rex, Queen Chrysalis,]][[note]]Though it's only their souls that qualify. [[spoiler: Rex's]] soul has been described as ''"[his soul] glowed with a blindingly bright darkness."''[[/note]] and Death/Chaos[[note]] Not the same as Discord[[/note]].
* ''Fanfic/BesidesTheWillOfEvil'': The BigBad wants to devour all the magic and every living thing in the universe, and occasionally reverts from his normal caribou body into a great floating mass of flesh and eyes and antlers. He was also so bad that the two previous names he went by can't be said by anyone else except Discord. He currently goes by Reiziger.
* ''Fanfic/TheElementsOfFriendship'': Book 1 has the Miasma, the abomination that turned [[WhatCouldHaveBeen Queen Selena]] into Nightmare Moon. And it's only one member of an extraterrestrial race of [[PuppeteerParasite Puppeteer Parasites]].
-->'''Crescent Rose''': The Miasmata are an abominable race of eldritch beasts from The Far Beyond. They feed by taking control of a lifeform and all of its powers, until the victim is exhausted. A victim can be more easily dominated if they are twisted by anger or rage.
* ''Fanfic/TheWorldIsFilledWithMonsters'': The entity brining the darkness to Hazelnacht, a vast living nightmare that manifests as a hole in the sky before erupting into a misshapen flood of body parts stretching and roiling across the heavens.
-->''It swelled. It breathed. High overhead, filling half the vault of heaven, the nightmare was born once more. It roiled and billowed and swallowed itself and blossomed, sprouting twisted wings and claws and beaks and tails; cancers and horns and shells and raw, weeping nerves and teeth that fit in no mouth and misshapen genitals both male and female. But none of these Vermilion noticed for more than a moment, because all he could see were its eyes, eyes that erupted like blisters from every aspect of its body, an eye for every pony in the world, and they all looked down at him.''

[[AC: ''Anime/{{Naruto}}'']]
* ''Fanfic/DestinyIsAHazyThing'': The Bijuu's AnimalisticAbomination forms were actually forced upon them by the Rikudo Sennin; their real forms are far more alien. Shukaku's true form, the only one seen so far, most closely resembles a massive sandstorm filled with lightning.

[[AC: ''Anime/NeonGenesisEvangelion'']]
* ''Fanfic/ACrownOfStars'': Daniel and their family's true shapes are pretty incomprehensible and confusing to human senses. Even post-fusion with Lilith Rei Ayanami gets disturbed by Daniel.
* ''Fanfic/TheChildOfLove'':
** In chapter 3 a fanmade Angel shows up. It looks like a thin feather with a sphere on the top. An examination reveals that it might seem light but it weighs 3,000,000,000 tons.
** In chapter 7 another fanmade Angel shows up. It looked like a winged Evangelion unit.
* ''FanfiC/DoingItRightThisTime'': After returning to the past, Shinji, Asuka and Rei have to fight the giant alien Angels... again. The "alien goddess in the basement who may or may not be God" Lilith is also mentioned.
* ''Fanfic/{{HERZ}}'': In addition to the Angels the cast defeated in the backstory, the alien deities and Seeds of Life Adam and Lilith [[spoiler:whom Rei absorbed]] and the MP-Evas, several countries try to create their own Evangelion, and sometimes they spawn shapeless, massive monsters with too many limbs and heads sprouting from strange places. SEELE also created a new batch of MP-Evas to fight the main characters.
* In ''Fanfic/NeonGenesisEvangelionGenocide'' new Angels appear, [[spoiler:though they are in reality artificially created from the flesh of a rogue Evangelion unity, made by an advanced computer program, which has the ability to manipulate the DNA found in Evas on a molecular level]]. One of them is a massive inky blob that turns into a sphere of black energy.
* ''FanFic/NobodyDies'': Rei Ayanami is this. The Angels, bizarrely enough, are a bit less Eldritch than they were in the series, due to actually having characters, motivations, and bothering to communicate with the heroes. Even then, constructs like [[spoiler:whatever the hell 02-Ef A9 becomes]] still count.
* ''Fanfic/HigherLearning'': The giant aliens Angels of the original series also show up here. Special mention goes to Bardiel, since [[spoiler:he was defeated in a very different way, and he was unable to hijack Unit-03]]. Its true body resembled a black, amorphous stormcloud.
* ''Fanfic/OnceMoreWithFeeling'' sees Shinji having to fight the Angel again... and unfortunately they seem more powerful than they were in the original timeline.
* ''Fanfic/TheOneILoveIs'': Nearly all of the Angels are true to their canon selves, except for Tabris. He is [[spoiler:a her in this story]]. Adam -- the father of the Angels -- and Lilith -- mother of all life on Earth -- also show up. In addition to them [[spoiler:Gendo manages to merge with both Adam and Lilith at the end of the story.]]

[[AC: ''VideoGame/Persona4'']]
* [[http://www.fanfiction.net/s/4798922/1/ ''Persona 4: Five Years Later'']] has [[spoiler: Amatsu Mikaboshi, a sentient void without a self-identity, instead referring to himself as "the entity", a barely-sentient but very intelligent incarnation of the Void that existed before time, utterly devoid of human influence. Souji can only classify the Amatsu as pure nothingness, and Igor describes it as similar to Nyx]].

[[AC: ''Franchise/{{Pokemon}}'']]
* ''Fanfic/LatiasJourney'' is chock full of Abominations all led and mostly created by the BigBad Deoxys (who is one himself), being the embodiment of [[ChaoticEvil evil and chaos]]. Others include:
** Dark Latios, the evil undead brother of the main protagonist who ends up [[MindRape mind raping]] her until she transforms into an EldritchAbomination herself.
** Mewgle, a ShoutOut to the Moogles from ''Franchise/FinalFantasy''. Starting off as the innocent dungeon master of Team Rocket's virtual reality software, Mewgle is recruited by Deoxys and turns into a sadistic KillerGameMaster with JokerImmunity.
** Leviathan, an enormous red serpent who devours all the Ghost Pokemon in the world and is made out of thousands of corpses. Oh, and [[spoiler: she is Latias' mutated mother.]]
** The sequel, ''Fanfic/BraveNewWorld'', has abominations like [[{{Orochi}} Yamatorochi]] and Jovi after Tarantulas's experiments. [[GodOfEvil Giratina]] is still an Eldritch, and other beasties like the [[PlanetEater Gaiavore]] are sure to show up later.
*** Leviathan also returns as a creation of the Ruler of Evil used during the Crisis Wars.
*** Arackaiser [[spoiler: merges the [[FaceHeelTurn legendary birds]] into Maelstrom during the Battle of Shimmer Desert. He does the same thing to the [[BrainwashedAndCrazy legendary beasts]], merging them into Cerberus, who is [[AnticlimaxBoss easily separated]] by Leo]].
* ''Fanfic/PokemonMysteryDungeonJournal'' has [[spoiler:Heath, the main character,]] being revealed as one of these midway through the story. It's a shock even to him.
* ''FanFic/TheSunSoul'' has its depiction of Zapdos, who is somewhere between this and OlympusMons.
-->'''Sabrina''': ...a nameless thing [[TimeAbyss predating humanity by countless centuries]]. Team Rocket called it Zapdos, but when I bent all of my power to putting it to sleep and my mind touched its surface thoughts, I immediately knew that [[YouCannotGraspTheTrueForm no name anyone could give that thing could properly describe its... essence]]. Simply forcing Zapdos into a sleep deep enough to allow for safely moving it claimed the lives of two of my psychics. Their minds [[GoMadFromTheRevelation couldn't handle the contact and burned out]], but thanks to them, we safely moved Zapdos to the old power plant and began siphoning off its energy.
* In ''FanFic/ThePowerThatsInside'', [[spoiler: Meowth becomes a GlitchEntity. for a moment after having his energy harvested.]]
* In ''Fanfic/PokemonResetBloodlines'', there's ''MissingNo'' itself, originated as a remnant of the previous timeline. It's apparently been known for several demonic names, and takes great pleasure in tormenting Ash about the things that have happened or will happen to his friends, knowing that he can't do anything about it.
* The various Legendaries in ''Fanfic/{{Traveler}}'' aren't so much powerful Pokémon as they are gods whose mere presence can wipe out entire regions. The Legendary Birds in particular have a possibly [[GameFace true form that turns them into masses of their element in the rough shape of a bird]], such as Moltres being a towering inferno that resembles a bird with molten lava for legs. The [[Anime/Pokemon2000 massive storm the Shamouti birds caused that would wipe out the world]]? That was nothing but a territorial display between the three; and Lugia confesses that each is only a third as strong as they used to be.

[[AC: ''Anime/PuellaMagiMadokaMagica'']]

* Esurientes assume the place of Witches in the Madoka fanfic ''FanFic/CibusEsculentusMadokaMagica''. Originating as humans overloaded with negativity, they manifest as all manner of predatory beasts. They maintain barriers to avoid detection by normal humans in order to eat without disruption, and once they eat enough, they then burst into spawn.

[[AC: ''WesternAnimation/RandyCunninghamNinthGradeNinja'']]
* ''Fanfic/EnterKenFinlayson'' features Moloch the Death Raptor, one of the animalistic variety, who basically comes across as the Owlman from ''Series/LostTapes'' transplanted into a Randy Cunningham fan fiction.

[[AC: ''Franchise/SailorMoon'']]
* ''Fanfic/CelestialWarriorMoon'':
** The Entity behind the Dark Kingdom, who is really [[spoiler:Queen Metalia]]. The Entity arrived in the galaxy during the Silver Millennium and being a GalacticConquerer. Myddin's description of her is nothing short of Lovecraftian, and Ami flat out compares the Entity to Lovecraft's work.
--->'''Myddin''': Something dark entered our galaxy. What It was, is still unclear. Its intentions, however, could not be less ambiguous. It was a harbinger of chaos and destruction, reaping death wherever it went. My people were quick to intercept Its path, and It did not take kindly to us. I accompanied them to serve as witness to the event. I could never properly describe the beast before us. Envision viewing something through the extremities of your peripheral vision. It appeared as blurred, soft, and weak. No hard angles or sharp edges. Its true form remained hidden to me, a shapeless form concealed under a cloak of hollowness. In a word: imprecise.
** The Slender Man also shows up, named the Black King here.

[[AC: ''Franchise/TheSlenderManMythos'']]
* In ''Fanfic/ByTheFiresLight'', the Slender Man is implied to hail from TheDarkTimes and ends up bringing a bunch of [[EldritchAbomination his pals]] to reclaim the Earth at the end of the story.

[[AC: ''Franchise/SonicTheHedgehog'']]
* ''Fanfic/SonicXDarkChaos'':
** Dark Tails, the GreaterScopeVillain, is a physical manifestation of the Seedrians' collective terror of Tsali [[spoiler:and strongly implied to be a Forerunner in the rewrite]]. He begins to spread [[TheCorruption Dark Chaos Energy]] across the galaxy and is literally MadeOfEvil. During the final battle, he transforms from a gigantic multi-headed space dragon to an [[GeniusLoci entire sentient planet]]. And then he mutates into a [[YouCannotGraspTheTrueForm a literally incomprehensible mass]] of tentacles, eyes, mouths, and [[AndIMustScream voices crying in eternal agony]]. It's rather telling that it eventually took three Hyper-powered hedgehogs and ''both Satan and Jesus Christ in person'' (combined) to finally beat him [[spoiler:[[CruelTwistEnding which ends up backfiring horribly]]]].
** [[AbusivePrecursors The Forerunners]] are an entire race of these, [[SealedEvilInACan sealed deep inside the depths of Warpspace long ago]]. [[spoiler:And it turns out they're [[EnemyCivilWar not all]] [[DefectorFromDecadence evil]] either]]. And it turns out Sonic and friends have already seen some - [[spoiler:the Chao from the games are actually infant Forerunners.]]

[[AC: ''Franchise/StarWars'']]
* The Forceless Collective in the ''[[FanFic/StarWarsParanormalitiesTrilogy Star Wars: Paranormalities Trilogy]]'' is an entire faction of these from another galaxy. Not only would Force-sensitives sense something off the light-dark spectrum of the Force from these things, but they are disconnected from the universe by being a dead spot in TheForce and are implied not to be natural forms of life. Their primary symbiotic form, the [[BlobMonster Black Matter]], is not unlike Mnggal-Mnggal in the [[{{EldritchAbomination/Literature}} Literature section]]. Unlike Mnggal-Mnggal however, the victims it possesses are still alive and conscious and can live for as long as several thousand years. If the host gets along with the symbiote, everything goes fine for the host, [[AndIMustScream but if not, they lose control of their bodies while they still have access to their senses.]] (and Forceless are usually pretty ruthless). The creatures they possess also get [[BodyHorror mutated]] in the process of symbiosis, and some of them, particularly some of the [[SealedEvilInACan Archfiends]], qualify as abominations themselves.
* The Sleeper from ''Fanfic/TheDesertStorm'' series, more so than in canon. Its a tentacled monster living in the Water of Life, which is the source of Dathomir's power. It's [[ItCanThink fully sentient]], [[TimeAbyss impossibly ancient]], manifests as a giant horned Nightsister WreathedInFlames, can [[MindRape enter a person's mind]] with ease, has knowledge of the future, and is strong enough to sever the soul bond [[spoiler:between Ben and Obi-Wan]]. The Sleeper also possesses ResurrectiveImmortality, having already been killed many times by Nightsisters as a RiteOfPassage, and feeds off of Dathomir's LifeEnergy to survive. As if all that wasn’t enough, the creature claims to be the MonsterProgenitor of the Nightsisters.

[[AC: ''Franchise/{{Superman}}'']]
* ''Fanfic/HellsisterTrilogy'' has ComicBook/{{Darkseid}}, Franchise/TheDCU's GodOfEvil who is powerful enough to squash [[Franchise/{{Superman}} any]] [[ComicBook/{{Supergirl}} hero]] or kill his minions and bring them back to life.
* ''Fanfic/AForceOfFour'' has Mars, the immortal personification of War and conflict, scheming to destroy Earth and force all human souls to strengthening him by fighting forever.

[[AC: ''Franchise/SuperMarioBros'']]
* As revealed in Movie 1 of ''FanFic/ClashOfTheElements'', [[spoiler: Pandora, the dragon trapped within Subspace, is one of these, and it is said that it has the capacity to be able to drag an entire world into Subspace if it were to ever fully emerge from a Subspace Orb. It is also stated to have a rather netherworldly glow around it...]]

[[AC: ''VideoGame/TeamFortress2'']]
* In the ''VideoGame/TeamFortress2'' fandom, use of VideoGame/GarrysMod had created multiple popular freaks. The most popular and well-defined are dubbed (in no particular order) Painis Cupcake, Snyphurr, Dic Soupcan, the Odd Scout, and Vagineer. Painis Cupcake twists his body in ways that will instantly kill or disable a normal individual, and is a morbid cannibal who seldom says anything except "I am Painis Cupcake! I will eat you!". Snyphurr is a giant torso with a concealed, bloody head; he turns people into stone. Dic Soupcan floats, mumbles irritatingly, and has multiple Gran-Mal seizures and will regurgitate explosives if agitated. The Odd Scout is distorted past even [[Franchise/TheSlenderManMythos Slender Man]] proportions, converts other Scouts into its own distorted likeness, and can make YourHeadAsplode through eye contact. The Vagineer is the original, and probably the worst, speaking only [[BlackSpeech backwards]] and with powers ranging from using body parts of others to repair itself to corrupting others by its mere presence.

[[AC: ''WesternAnimation/TotalDrama'']]
* ''Fanfic/TheDoctorWillSeeYouNow'': The hints of the darkness that have been given titles (the Voice, Something beyond humanity, #409) show a complete disregard for humanity, even if their actions and presence harm them. The Voice either creates or allows vividly real visions of truly horrifying images of teenager’s gruesome deaths, complete with feeling the pain of a violent death. Even when saving her life, #409 does so by forcing Gwen to endure a painful ordeal while not showing even a minuscule amount of guilt. They don’t seem to hate humanity, but they don’t care about it either. That’s in some ways more horrifying, seeing how they alter reality.

[[AC: ''VideoGame/{{Touhou}}'']]
* ''FanFic/ImperfectMetamorphosis'':
** Rumia's SuperPoweredEvilSide, otherwise known as [[spoiler:the Shadow Youkai]], is WalkingWasteland personified; a single touch can result in death, and even the most powerful denizens of Gensokyo are not completely immune from its corruptive power. Near-impossible to kill, its vanquishers could only [[SealedEvilInACan seal it]] in a weakened from and strip it of its memories, but that didn't last long. Later events reveal it's [[spoiler:a FallenAngel.]]
** Yuuka Kazami is [[TheDreaded intensely feared by everyone]], [[RealityWarper Yukari's powers]] are ineffective against her, no-one has the slightest clue what she is, and she laughs off everything thrown at her. Even after assembling a team of godly powerhouses equipped with the most potent weapons in Yukari's arsenal the battle against her swiftly goes tits up, in the process revealing her nature as [[spoiler:a weakened Outer God.]]
* Yukari Yakumo's depiction in ''FanFic/MaidensIllusionaryFuneral''. She doesn't project her gaps, she ''is'' her gaps, a formless mass of darkness and eyes [[AFormYouAreComfortableWith masquerading as a human woman]]. She's so powerful that nothing in the story can stop her; getting '''bisected''' is less than an inconvenience, and she's the only one that can get close to Yuyuko without being killed, suggesting that she's beyond death.

[[AC: ''TabletopGame/{{Warhammer 40000}}'']]
* The Plot Hole from ''Fanfic/{{PRIMARCHS}}''. A living gestalt of all the plot holes accumulated in fiction that wants to eat the universe until only it remains.
* ''TabletopGame/{{Warhammer 40000}}'' has no shortage of this trope, but ''FanFic/TheShapeOfTheNightmareToCome'' adds even more. The New Devourer is an unstoppable tide of death and hunger that eats ''a third of all life in the galaxy'' before inexplicably leaving, with hints that it ate ''everything'' in another galaxy. The Star Father is the GodEmperor made manifest in the Warp, the [[LawfulEvil Chaos God of Order]] that removes all thought and emotion in its subjects, and is so powerful that it took '''all four''' of the other Chaos Gods attacking it at once to prevent it from crushing them. Almost nothing is known of the Ophilim Kiasoz except that it causes entire star systems to ''cease to exist'' simply by being near them. And then there's the Nex, an UltimateEvil at the (maybe) heart of the Warp. To GoMadFromTheRevelation is the ''least'' terrible thing that can happen to you if you learn '''anything''' about it beyond its name.
* ''FanFic/TheAgeOfDusk'', sequel to ''Nightmare to Come'', adds Draziin-maton, apparently Pre-Fall Eldar constructs possessed by... something, from layers of Warp so deep that their presence alone turns ''Daemons'' into unfanthomable, mindless chaos. WordOfGod says the chaos gods themselves are only aspects of the Nex.

[[AC: ''WesternAnimation/{{WITCH}}'']]
* ''Fanfic/{{Ripples}}'' has A'lek'hol'an, the entity that Will/Van makes a [[DealWithTheDevil deal]] with during a near-death experience. The last of TheOldGods, Will isn't able to even remotely grasp his true form on the spirit realm, and in Meridian he takes the form of a [[GeniusLoci sentient swamp]], which is where the cult that worships him is located. He's also insanely powerful, as he's able to [[BalefulPolymorph completely change Will's body]] and enhance her powers, seemingly at a whim.

[[AC: ''Literature/{{Worm}}'']]
* In ''Fanfic/{{Propagation}}'' a gigantic, glowing, semi-transparent blue mass of tendrils, hands, and faces manifests at Winslow High due to Eden's core being part of Taylor's Trigger. [[spoiler: It is Taylor's true form.]]

[[AC: ''Anime/YuGiOh5ds'']]
* ''FanFic/MyDarkKing'' has the King of the Underworld, who takes it to the logical extreme and is worse than in the anime. It can spawn lesser Earthbound Gods from its body, and according to [[TookALevelInBadass Judai]], it arrived on Earth [[PhlebotinumKilledTheDinosaurs 65 million years ago]]. It gets into a fight with the Sengenma, as well.
** It is actually part of an entire ''species'' of extraterrestrial abominations, which Judai calls Coisichean Dorchadas (Gaelic for "darkness walkers"). Such members of the race include [[Anime/YuGiOhGX Darkness]], [[Anime/YuGiOh Zorc, and the Great Leviathan]].

----
[[redirect:EldritchAbomination/FanWorks]]
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* ''Fanfic/TheDesertStorm'': The Sleeper is a tentacled monster living in the Water of Life, which is the source of Dathomir's power. It's [[ItCanThink fully sentient]], [[TimeAbyss impossibly ancient]], manifests as a giant horned Nightsister WreathedInFlames, can [[MindRape enter a person's mind]], has knowledge of the future, and is strong enough to sever the soul bond [[spoiler:between Ben and Obi-Wan]]. The Sleeper also possesses ResurrectiveImmortality, having already been killed many times by Nightsisters as a RiteOfPassage, and feeds off of Dathomir's LifeEnergy to survive. As if all that wasn’t enough, in addition to everything previously mentioned, the creature claims to be the MonsterProgenitor of the Nightsisters.

to:

* ''Fanfic/TheDesertStorm'': The Sleeper is from ''Fanfic/TheDesertStorm'' series, more so than in canon. Its a tentacled monster living in the Water of Life, which is the source of Dathomir's power. It's [[ItCanThink fully sentient]], [[TimeAbyss impossibly ancient]], manifests as a giant horned Nightsister WreathedInFlames, can [[MindRape enter a person's mind]], mind]] with ease, has knowledge of the future, and is strong enough to sever the soul bond [[spoiler:between Ben and Obi-Wan]]. The Sleeper also possesses ResurrectiveImmortality, having already been killed many times by Nightsisters as a RiteOfPassage, and feeds off of Dathomir's LifeEnergy to survive. As if all that wasn’t enough, in addition to everything previously mentioned, the creature claims to be the MonsterProgenitor of the Nightsisters.
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* ''Fanfic/TheDesertStorm'': The Sleeper is a tentacled monster living in the Water of Life, which is the source of Dathomir's power. It's [[ItCanThink fully sentient]], [[TimeAbyss impossibly ancient]], manifests as a giant horned Nightsister covered in flames, can [[MindRape enter a person's mind]], has knowledge of the future, and is strong enough to sever the soul bond [[spoiler:between Ben and Obi-Wan]]. The Sleeper also possesses ResurrectiveImmortality, having already been killed many times by Nightsisters as a RiteOfPassage, and feeds off of Dathomir's LifeEnergy to survive. As if all that wasn’t enough, in addition to everything previously mentioned, the creature claims to be the MonsterProgenitor of the Nightsisters.

to:

* ''Fanfic/TheDesertStorm'': The Sleeper is a tentacled monster living in the Water of Life, which is the source of Dathomir's power. It's [[ItCanThink fully sentient]], [[TimeAbyss impossibly ancient]], manifests as a giant horned Nightsister covered in flames, WreathedInFlames, can [[MindRape enter a person's mind]], has knowledge of the future, and is strong enough to sever the soul bond [[spoiler:between Ben and Obi-Wan]]. The Sleeper also possesses ResurrectiveImmortality, having already been killed many times by Nightsisters as a RiteOfPassage, and feeds off of Dathomir's LifeEnergy to survive. As if all that wasn’t enough, in addition to everything previously mentioned, the creature claims to be the MonsterProgenitor of the Nightsisters.
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* ''Fanfic/TheDesertStorm'': The Sleeper is a tentacled monster living in the Water of Life, which is the source of Dathomir's power. It's [[ItCanThink fully sentient]], [[TimeAbyss impossibly ancient]], manifests as a giant horned Nightsister covered in flames, [[spoiler:can enter a person's mind, has knowledge of the future, and is strong enough to sever the Force bond between Ben and Obi-Wan.]] The Sleeper also possesses ResurrectiveImmortality, having already been killed many times by Nightsisters as a RiteOfPassage, and feeds off of Dathomir's LifeEnergy to survive. As if all this wasn’t enough, the creature claims to be the MonsterProgenitor of the Nightsisters.

to:

* ''Fanfic/TheDesertStorm'': The Sleeper is a tentacled monster living in the Water of Life, which is the source of Dathomir's power. It's [[ItCanThink fully sentient]], [[TimeAbyss impossibly ancient]], manifests as a giant horned Nightsister covered in flames, [[spoiler:can can [[MindRape enter a person's mind, mind]], has knowledge of the future, and is strong enough to sever the Force soul bond between [[spoiler:between Ben and Obi-Wan.]] Obi-Wan]]. The Sleeper also possesses ResurrectiveImmortality, having already been killed many times by Nightsisters as a RiteOfPassage, and feeds off of Dathomir's LifeEnergy to survive. As if all this that wasn’t enough, in addition to everything previously mentioned, the creature claims to be the MonsterProgenitor of the Nightsisters.
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to:

* ''Fanfic/TheDesertStorm'': The Sleeper is a tentacled monster living in the Water of Life, which is the source of Dathomir's power. It's [[ItCanThink fully sentient]], [[TimeAbyss impossibly ancient]], manifests as a giant horned Nightsister covered in flames, [[spoiler:can enter a person's mind, has knowledge of the future, and is strong enough to sever the Force bond between Ben and Obi-Wan.]] The Sleeper also possesses ResurrectiveImmortality, having already been killed many times by Nightsisters as a RiteOfPassage, and feeds off of Dathomir's LifeEnergy to survive. As if all this wasn’t enough, the creature claims to be the MonsterProgenitor of the Nightsisters.
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* In ''Fanfic/PokemonResetBloodlines'', there's ''[[GlitchEntity MissingNo]]'' itself, originated as a remnant of the previous timeline. It's apparently been known for several demonic names, and takes great pleasure in tormenting Ash about the things that have happened or will happen to his friends, knowing that he can't do anything about it.

to:

* In ''Fanfic/PokemonResetBloodlines'', there's ''[[GlitchEntity MissingNo]]'' ''MissingNo'' itself, originated as a remnant of the previous timeline. It's apparently been known for several demonic names, and takes great pleasure in tormenting Ash about the things that have happened or will happen to his friends, knowing that he can't do anything about it.
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* In ''FanFic/ThePowerThatsInside'', [[spoiler: Meowth becomes TheMissingNo. for a moment after having his energy harvested.]]
* In ''Fanfic/PokemonResetBloodlines'', there's ''[[TheMissingNo MissingNo]]'' itself, originated as a remnant of the previous timeline. It's apparently been known for several demonic names, and takes great pleasure in tormenting Ash about the things that have happened or will happen to his friends, knowing that he can't do anything about it.

to:

* In ''FanFic/ThePowerThatsInside'', [[spoiler: Meowth becomes TheMissingNo.a GlitchEntity. for a moment after having his energy harvested.]]
* In ''Fanfic/PokemonResetBloodlines'', there's ''[[TheMissingNo ''[[GlitchEntity MissingNo]]'' itself, originated as a remnant of the previous timeline. It's apparently been known for several demonic names, and takes great pleasure in tormenting Ash about the things that have happened or will happen to his friends, knowing that he can't do anything about it.
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to:

* While many demons in ''Fanfic/RemnantInferisDOOM'' are horrific to look at, most of them don't go too far beyond either AnimalisticAbomination or HumanoidAbomination territory. The Shadowlord that the first Icon of Sin fought in Hell's beginnings, however, falls squarely into this trope. It was described as an amorphous mass of phallic tentacles and reptilian maws that was gargantuan in size.
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* In ''[[https://www.fanfiction.net/s/7779108/1/The-Master-of-Death The Master of Death]]'', Literature/HarryPotter and his companion both appear as Eldritch Abominations when they appear in [[Literature/TheDresdenFiles the Dresden universe]] because according to his companion, the universe requires they leave behind their Shapes and borrow new ones from [[EldritchLocation a place where nothing exists]] until they leave. In his words, "There's quite a lot that doesn't exist. We didn't exist until a moment ago." As a result, to Dresden, most of his encounters with Harry are distinctly unnerving, because he thinks (and is technically right) that this twinkly eyed old man is one of the most terrifying entities ever to cross the boundaries of reality. The facts that parts of Harry's magic are ''literally impossible'' by Dresden Files standards, and that he usually appears through a gigantic train that seems to happily park in midair, doesn't help. Then Dresden winds up ''literally'' [[DidWeJustHaveTeaWithCthulhu having tea with Cthulhu.]]

to:

* In ''[[https://www.fanfiction.net/s/7779108/1/The-Master-of-Death The Master of Death]]'', ''Fanfic/RyuugisTheMasterOfDeath'', Literature/HarryPotter and his companion both appear as Eldritch Abominations when they appear in [[Literature/TheDresdenFiles the Dresden universe]] because according to his companion, the universe requires they leave behind their Shapes and borrow new ones from [[EldritchLocation a place where nothing exists]] until they leave. In his words, "There's quite a lot that doesn't exist. We didn't exist until a moment ago." As a result, to Dresden, most of his encounters with Harry are distinctly unnerving, because he thinks (and is technically right) that this twinkly eyed old man is one of the most terrifying entities ever to cross the boundaries of reality. The facts that parts of Harry's magic are ''literally impossible'' by Dresden Files standards, and that he usually appears through a gigantic train that seems to happily park in midair, doesn't help. Then Dresden winds up ''literally'' [[DidWeJustHaveTeaWithCthulhu having tea with Cthulhu.]]
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* ''FanFic/PurpleDays'': [[ZombieApocalypse The White Walkers]]. [[GroundhogPeggySue The Purple]] as well. Joffrey and Sansa consider that they ''themselves'' are turning into this in late loops.

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* ''FanFic/PurpleDays'': [[ZombieApocalypse The Long Night and the White Walkers]]. [[GroundhogPeggySue The Purple]] as well. The monstrosity in Stygai, whatever it is, also qualifies as this. Joffrey and Sansa consider that they ''themselves'' are turning into this in late loops.
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[[AC: ''Literature/ASongOfIceAndFire'']]
* ''FanFic/PurpleDays'': [[ZombieApocalypse The White Walkers]]. [[GroundhogPeggySue The Purple]] as well. Joffrey and Sansa consider that they ''themselves'' are turning into this in late loops.

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* ''FanFic/EquestrianAllianceProjectOblivion'' features [[spoiler:Shub-Niggurath]], an Outer God of the Franchise/CthulhuMythos, as [[spoiler:the primary BigBad.]]

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* ''FanFic/EquestrianAllianceProjectOblivion'' [[GodOfChaos Discord]] is frequently written (most famously in the ''FanFic/PonyPOVSeries'') as [[AnthropomorphicPersonification the personification of chaos itself]], whose [[RealityWarper near-unlimited power]] stems from him being so fundamentally opposed to ''reality itself'' that they reject each other, allowing him to make pretzels out of physics, and is [[EvilCannotComprehendGood completely incapable of comprehending]] things that are remotely orderly or sane.
* ''Fanfic/EquestrianAllianceProjectOblivion''
features [[spoiler:Shub-Niggurath]], an Outer God of the Franchise/CthulhuMythos, as [[spoiler:the primary BigBad.]]



* [[GodOfEvil Discord]] is frequently written (most famously in the ''FanFic/PonyPOVSeries'') as [[AnthropomorphicPersonification the personification of chaos itself]], whose [[RealityWarper near-unlimited power]] stems from him being so fundamentally opposed to ''reality itself'' that they reject each other, allowing him to make pretzels out of physics, and is [[EvilCannotComprehendGood completely incapable of comprehending]] things that are remotely orderly or sane.
* ''FanFic/PonyPOVSeries'':

to:

* [[GodOfEvil Discord]] is frequently written (most famously in the ''FanFic/PonyPOVSeries'') as [[AnthropomorphicPersonification the personification of chaos itself]], whose [[RealityWarper near-unlimited power]] stems from him being so fundamentally opposed to ''reality itself'' that they reject each other, allowing him to make pretzels out of physics, and is [[EvilCannotComprehendGood completely incapable of comprehending]] things that are remotely orderly or sane.
* ''FanFic/PonyPOVSeries'':
''Fanfic/PonyPOVSeries'':



** The Shadows Who Make, Watch, and Rule, beings beyond even the Elders, who Celestia refuses to describe to anyone in-universe, since she knows it would cause them to GoMadFromTheRevelation. [[spoiler:They turn out to be [[HumansAreCthulhu the writers, readers, and Hasbro]], respectfully.]]

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** The Shadows Who Make, Watch, and Rule, beings beyond even the Elders, who Celestia refuses to describe to anyone in-universe, since she knows it would cause them to GoMadFromTheRevelation. [[spoiler:They turn out to be [[HumansAreCthulhu the writers, readers, and Hasbro]], respectfully.respectively.]]



** [[spoiler:Nightmare Phobia]], the BigBad of the Chaos Verse (an official spinoff of the ''POV Series''), is made from [[spoiler:the remains of Nightmare Moon's essence]], and exists primarily in the collective subconscious of ponykind. And that's ''before'' she goes OneWingedAngel, at which point she [[spoiler:becomes a sentient void, which consumes Discord's pocket dimension and nearly emerges into the real world, which causes ''every living thing'' extreme pain]].



* In ''FanFic/UnderTheNorthernLights'', Luna's and Celestia's greatuncles and greataunts are described in a vision as "lights... sounds... patterns of magic in a black sphere that itched the brain and made the soul cry". They decided the laws of nature, seemingly on a whim. The only hostile one seems to be Discord, though, and his reality warping powers are presumably because he never agreed to what his siblings decided. The generation of their parents has some traits of eldritch abominations but are more like OurTitansAreDifferent, having motivations similar to mortal ungulates despite their ancient age, huge size, and inequine shape.
* ''FanFic/TheStarsWillAidTheirEscape'' just cuts to the chase and outright crosses over with the Franchise/CthulhuMythos. Therefore, the BigBad is a stallion avatar of Nyarlathotep who hides his face behind a mask, as seeing it causes the viewer to go insane [[spoiler:which is what happens to Twilight]]; his {{Mooks}} are the Dark Young of Shub-Niggurath; and in true Mythos fashion, Trixie goes crazy after using the ''[[TomeOfEldritchLore Neighcronomicon]]'' and seeing the Young for the first time.
* [[spoiler:Nightmare Phobia]], the BigBad of the [[Fanfic/PonyPOVSeriesChaosVerse Chaos Verse]] (an official spinoff of the ''POV Series''), is made from [[spoiler:the remains of Nightmare Moon's essence]], and exists primarily in the collective subconscious of ponykind. And that's ''before'' she goes OneWingedAngel, at which point she [[spoiler:becomes a sentient void, which consumes Discord's pocket dimension and nearly emerges into the real world, which causes ''every living thing'' extreme pain]].
* [[VileVillainSaccharineShow Of all works]], ''Blog/{{Moonstuck}}'' has [[spoiler:Discord]]. He uses an EnemyWithout and a personification of depression as his puppets, drastically distorts and at one point ''shatters'' the fourth wall and the ''narration'', and his speech and appearance are very similar to [[Anime/TengenToppaGurrenLagann the Anti-Spirals]] (probably deliberately, as the author is a fan).
* ''[[Fanfic/AFutureOfFriendshipAHistoryOfHate A Future of Friendship, A History of Hate]]'': The [[BenevolentPrecursors Sentiox]] came into being [[TimeAbyss billions of years ago]] (and have since moved on to another plane of existence), came in a vast variety of forms (some rather normal-looking, some... not), and were powerful enough to create worlds... or in the case of [[BigBad Ruinate]], easily [[OmnicidalManiac destroy them]]. And speaking of Ruinate, he's one of the more otherworldly-looking Sentiox, being a large, vaguely frog-like creature, with three red eyes with cat-like slits, surrounded by (and possibly made of) a miasma of dark energy.
* Parodied by the Blog/ReadingRainbowverse version of the Shadowbolts. They're definitely eldritch, and they can only be seen by Lightning Dust... but they only irritate her instead of driving her mad and the worse thing they've done is draw a penis on her forehead.
* ''FanFic/NightmaresAreTragic'': This is true not only of the villainous and extradimensional Night Shadows, but also of ''all'' Cosmic beings in our own Universe, including not only the Draconequii but even the Alicorns. The Alicorn Avatars in which Celestia and Luna incarnate are AFormYouAreComfortableWith.
* ''FanFic/TheTearsOfGaia'':

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* In ''FanFic/UnderTheNorthernLights'', ''Fanfic/UnderTheNorthernLights'', Luna's and Celestia's greatuncles and greataunts are described in a vision as "lights... sounds... patterns of magic in a black sphere that itched the brain and made the soul cry". They decided the laws of nature, seemingly on a whim. The only hostile one seems to be Discord, though, and his reality warping powers are presumably because he never agreed to what his siblings decided. The generation of their parents has some traits of eldritch abominations but are more like OurTitansAreDifferent, having motivations similar to mortal ungulates despite their ancient age, huge size, and inequine shape.
* ''FanFic/TheStarsWillAidTheirEscape'' ''Fanfic/TheStarsWillAidTheirEscape'' just cuts to the chase and outright crosses over with the Franchise/CthulhuMythos. Therefore, the BigBad is a stallion avatar of Nyarlathotep who hides his face behind a mask, as seeing it causes the viewer to go insane [[spoiler:which is what happens to Twilight]]; his {{Mooks}} are the Dark Young of Shub-Niggurath; and in true Mythos fashion, Trixie goes crazy after using the ''[[TomeOfEldritchLore Neighcronomicon]]'' and seeing the Young for the first time.
* [[spoiler:Nightmare Phobia]], the BigBad of the [[Fanfic/PonyPOVSeriesChaosVerse Chaos Verse]] (an official spinoff of the ''POV Series''), is made from [[spoiler:the remains of Nightmare Moon's essence]], and exists primarily in the collective subconscious of ponykind. And that's ''before'' she goes OneWingedAngel, at which point she [[spoiler:becomes a sentient void, which consumes Discord's pocket dimension and nearly emerges into the real world, which causes ''every living thing'' extreme pain]].
*
''Blog/{{Moonstuck}}'', [[VileVillainSaccharineShow Of of all works]], ''Blog/{{Moonstuck}}'' has [[spoiler:Discord]]. He uses an EnemyWithout and a personification of depression as his puppets, drastically distorts and at one point ''shatters'' the fourth wall and the ''narration'', and his speech and appearance are very similar to [[Anime/TengenToppaGurrenLagann the Anti-Spirals]] (probably deliberately, as the author is a fan).
* ''[[Fanfic/AFutureOfFriendshipAHistoryOfHate A Future of Friendship, A History of Hate]]'': ''Fanfic/AFutureOfFriendshipAHistoryOfHate'': The [[BenevolentPrecursors Sentiox]] came into being [[TimeAbyss billions of years ago]] (and have since moved on to another plane of existence), came in a vast variety of forms (some rather normal-looking, some... not), and were powerful enough to create worlds... or in the case of [[BigBad Ruinate]], easily [[OmnicidalManiac destroy them]]. And speaking of Ruinate, he's one of the more otherworldly-looking Sentiox, being a large, vaguely frog-like creature, with three red eyes with cat-like slits, surrounded by (and possibly made of) a miasma of dark energy.
* Blog/ReadingRainbowverse: Parodied by the Blog/ReadingRainbowverse blog's version of the Shadowbolts. They're definitely eldritch, and they can only be seen by Lightning Dust... but they only irritate her instead of driving her mad and the worse thing they've done is draw a penis on her forehead.
* ''FanFic/NightmaresAreTragic'': ''Fanfic/NightmaresAreTragic'': This is true not only of the villainous and extradimensional Night Shadows, but also of ''all'' Cosmic beings in our own Universe, including not only the Draconequii but even the Alicorns. The Alicorn Avatars in which Celestia and Luna incarnate are AFormYouAreComfortableWith.
* ''FanFic/TheTearsOfGaia'':''Fanfic/TheTearsOfGaia'':



* ''[[FanFic/BlackQueenRedKing Black Queen, Red King]]'' has at least three: [[spoiler: Rex, Queen Chrysalis,]][[note]]Though it's only their souls that qualify. [[spoiler: Rex's]] soul has been described as ''"[his soul] glowed with a blindingly bright darkness."''[[/note]] and Death/Chaos[[note]] Not the same as Discord[[/note]].
* The BigBad in ''FanFic/BesidesTheWillOfEvil'' wants to devour all the magic in the universe. He was also so bad that the two previous names he went by can't be said by anyone else except Discord. He currently goes by Reiziger.
* Book 1 of ''FanFic/TheElementsOfFriendship'' has the Miasma, the abomination that turned [[WhatCouldHaveBeen Queen Selena]] into Nightmare Moon. And it's only one member of an extraterrestrial race of [[PuppeteerParasite Puppeteer Parasites]].

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* ''[[FanFic/BlackQueenRedKing Black Queen, Red King]]'' ''Fanfic/BlackQueenRedKing'' has at least three: [[spoiler: Rex, Queen Chrysalis,]][[note]]Though it's only their souls that qualify. [[spoiler: Rex's]] soul has been described as ''"[his soul] glowed with a blindingly bright darkness."''[[/note]] and Death/Chaos[[note]] Not the same as Discord[[/note]].
* ''Fanfic/BesidesTheWillOfEvil'': The BigBad in ''FanFic/BesidesTheWillOfEvil'' wants to devour all the magic and every living thing in the universe.universe, and occasionally reverts from his normal caribou body into a great floating mass of flesh and eyes and antlers. He was also so bad that the two previous names he went by can't be said by anyone else except Discord. He currently goes by Reiziger.
* ''Fanfic/TheElementsOfFriendship'': Book 1 of ''FanFic/TheElementsOfFriendship'' has the Miasma, the abomination that turned [[WhatCouldHaveBeen Queen Selena]] into Nightmare Moon. And it's only one member of an extraterrestrial race of [[PuppeteerParasite Puppeteer Parasites]].




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* ''Fanfic/TheWorldIsFilledWithMonsters'': The entity brining the darkness to Hazelnacht, a vast living nightmare that manifests as a hole in the sky before erupting into a misshapen flood of body parts stretching and roiling across the heavens.
-->''It swelled. It breathed. High overhead, filling half the vault of heaven, the nightmare was born once more. It roiled and billowed and swallowed itself and blossomed, sprouting twisted wings and claws and beaks and tails; cancers and horns and shells and raw, weeping nerves and teeth that fit in no mouth and misshapen genitals both male and female. But none of these Vermilion noticed for more than a moment, because all he could see were its eyes, eyes that erupted like blisters from every aspect of its body, an eye for every pony in the world, and they all looked down at him.''
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* In ''Fanfic/AvengerOfSteel'', this is how [[spoiler: Trigon]] is presented, being an entity from a dimensional plane above the normal multiverse that is so incomprehensible and powerful that [[BrownNote seeing him would drive most mortals insane]], and a full manifestation by him on Earth would shatter reality. Also, he's literally MadeOfEvil, as after others of his kind cast him into the Heart of Darkness (a dimension that is said to be the source of all evil energies), he ''absorbed it all''.
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[[AC: ''WesternAnimation/TheLoudHouse'']]
* In ''Fanfic/{{Revival}}'', [[BigBad Maya Lottie]] is in truth the voice of the Outer Gods Nyarlathotep who manipulates Lana into reading the Necronomicon as a means of freeing the other Outer Gods. Nyarlathotep mainly appears as a 12-year-old girl due to mocking her slave over him killing his daughter and his family.
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Disney has been depreciated as a namespace.


* ''Fanfic/LostTalesOfFantasia'' has the inhabitants of [[Disney/AliceInWonderland Wonderland]], which are described as demonic creatures of nightmares. Wonderland itself is an EldritchLocation that is said to be {{Hell}}. The two beings we see that come from it, [[AdaptationalVillainy Alice]] and [[Disney/TheAdventuresOfIchabodAndMrToad the Headless Horseman]], are definitely [[HumanoidAbomination Humanoid Abominations]]. [[Disney/{{Fantasia}} Chernabog]] is also hinted at.

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* ''Fanfic/LostTalesOfFantasia'' has the inhabitants of [[Disney/AliceInWonderland [[WesternAnimation/AliceInWonderland Wonderland]], which are described as demonic creatures of nightmares. Wonderland itself is an EldritchLocation that is said to be {{Hell}}. The two beings we see that come from it, [[AdaptationalVillainy Alice]] and [[Disney/TheAdventuresOfIchabodAndMrToad [[WesternAnimation/TheAdventuresOfIchabodAndMrToad the Headless Horseman]], are definitely [[HumanoidAbomination Humanoid Abominations]]. [[Disney/{{Fantasia}} [[WesternAnimation/{{Fantasia}} Chernabog]] is also hinted at.
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[[AC: ''Film/DoctorSleep'']]
* In ''FanFic/TheResurrectionOfRose'', the [[Film/TheShining Overlook Hotel]] is a full-fledged entity that drives the inhabitants insane climaxing in their deaths from murder-suicide. After the events of the film, [[BigBad Rose the Hat]] aims to use it to make herself the most powerful Shiner in existence.
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* Mort in ''[[https://www.fanfiction.net/s/12754810/1/Monsterous Monsterous]]'' is a being of smoke and shadows that can grow a hardened spiked carapace in an instant, moves on four legs or two as it feels appropriate, has a tail that ends in three prehensile claws, and lacks any sort of face. On top of this it's shown to change size from a large horse to an [[Literature/TheLordOfTheRings Oliphant]] and anywhere in between along with casually changing it's skeletal structure (it once "flexed the bones" of its skull out of boredom) and is capable of using magic. [[spoiler:Oh and [[WasOnceAMan it used to Harry Potter]].]]

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* Mort in ''[[https://www.fanfiction.net/s/12754810/1/Monsterous Monsterous]]'' is a being of smoke and shadows that can grow a hardened spiked carapace in an instant, moves on four legs or two as it feels appropriate, has a tail that ends in three prehensile claws, and lacks any sort of face. On top of this it's shown to change size from a large horse to an [[Literature/TheLordOfTheRings Oliphant]] and anywhere in between along with casually changing it's skeletal structure (it once "flexed the bones" of its skull out of boredom) and is capable of using magic. [[spoiler:Oh and [[WasOnceAMan it used to be Harry Potter]].]]
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* [[https://www.fanfiction.net/s/10602465/1/Biomass-Effect Biomass Effect]]: in addition to the things we see in VideoGame/MassEffect and Videogame/{{Prototype}} we have the things created by the "Children of Saleon" virus created by [[MadScientist Dr. Heart]], for reference, this is a virus that is both [[TooSpicyForYogSothoth too spicy for Blacklight]] to consume, can incorporate inorganic matter into its form, and according to Blacklight which can rewrite its DNA however it wants, [[StarfishAliens makes zero biological sense]], examples include:

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* [[https://www.fanfiction.net/s/10602465/1/Biomass-Effect Biomass Effect]]: ''Fanfic/BiomassEffect'': in addition to the things we see in VideoGame/MassEffect and Videogame/{{Prototype}} we have the things created by the "Children of Saleon" virus created by [[MadScientist Dr. Heart]], for reference, this is a virus that is both [[TooSpicyForYogSothoth too spicy for Blacklight]] to consume, can incorporate inorganic matter into its form, and according to Blacklight which can rewrite its DNA however it wants, [[StarfishAliens makes zero biological sense]], examples include:
Is there an issue? Send a MessageReason:
None


* [[https://www.fanfiction.net/s/10602465/1/Biomass-Effect Biomass Effect]]: in adition to the things we see in VideoGame/MassEffect and Videogame/{{Prototype}} we have the things created by the "Children of Saleon" virus created by [[MadScientist Dr. Heart]], for reference, this is a virus that is both [[TooSpicyForYogSothoth too spicy for Blacklight]] to consume, can incorporate inorganic matter into its form, and according to Blacklight which can rewrite its DNA however it wants, [[StarfishAliens makes zero biological sense]], examples include:

to:

* [[https://www.fanfiction.net/s/10602465/1/Biomass-Effect Biomass Effect]]: in adition addition to the things we see in VideoGame/MassEffect and Videogame/{{Prototype}} we have the things created by the "Children of Saleon" virus created by [[MadScientist Dr. Heart]], for reference, this is a virus that is both [[TooSpicyForYogSothoth too spicy for Blacklight]] to consume, can incorporate inorganic matter into its form, and according to Blacklight which can rewrite its DNA however it wants, [[StarfishAliens makes zero biological sense]], examples include:
Is there an issue? Send a MessageReason:
None


* [[https://www.fanfiction.net/s/10602465/1/Biomass-Effect Biomass Effect]]: in adition to the things we see in VideoGame/{{MassEffect}} and Videogame/Prototype we have the things created by the "Children of Saleon" virus created by [[MadScientist Dr. Heart]], for reference, this is a virus that is both [[TooSpicyForYogSothoth too spicy for Blacklight]] to consume, can incorporate inorganic matter into its form, and according to Blacklight which can rewrite its DNA however it wants, [[StarfishAliens makes zero biological sense]], examples include:

to:

* [[https://www.fanfiction.net/s/10602465/1/Biomass-Effect Biomass Effect]]: in adition to the things we see in VideoGame/{{MassEffect}} VideoGame/MassEffect and Videogame/Prototype Videogame/{{Prototype}} we have the things created by the "Children of Saleon" virus created by [[MadScientist Dr. Heart]], for reference, this is a virus that is both [[TooSpicyForYogSothoth too spicy for Blacklight]] to consume, can incorporate inorganic matter into its form, and according to Blacklight which can rewrite its DNA however it wants, [[StarfishAliens makes zero biological sense]], examples include:

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