Axis Powers Hetalia
Calvin and Hobbes
- A Triangle in the Stars has the Cluster Demons from the school arc. They're reminiscent of the Gem Mutants from the primary home series, punished amalgamations of different demons who refused to break their loyalty ties from Bill to join Gabriel.
- Child of the Storm has Gravemoss as a one-man (though calling him a man is dubious because of his origins — he's from Alfheim — and he's basically a Humanoid Abomination) vehicle of this. His main contribution is the veidrdraugar a.k.a. the Hunting Dead, which are just as terrifying as they sound, being super-fast, super-strong stealth zombies that hunt in packs by way of telepathic connection with a ravenous hunger, though, being a Necromancer, he provides plenty of contributions, such as (apparently permanently) mutating werewolves into giant (i.e. the largest is referred to as hummer sized/tank sized) wolves all month round and slaughtering what is possibly every Hebridean Black Dragon on the planet with a spell which was purposefully reminiscent of Dark V's Familicide and reanimating them as an undead army. Some of them had visibly broken bodies, from where they landed badly on dying. They flew anyway.
- Gravemoss himself has this inflicted on him repeatedly in chapter 76. First, Chthon briefly possesses him and makes him smile so widely that his skin rips open to give him a Glasgow Grin, Second, Harry snaps and telekinetically opens his chest cavity like a book and rips out his heart - something his companions describe as disgusting, before he and Carol as the new Green Lantern blast him halfway across London and third, when he winds up in front Wanda and Harry Dresden, the former of whom reopens a number of former wounds, before the latter accidentally conjures a Soulfire lightsabre which he uses to eviscerate the necromancer, then chop his arm off. Really, it's only because he's got an insanely powerful Healing Factor (as a result of being a Humanoid Abomination) that he's still alive.
- Wanda inflicts this on Sinister in chapter 10 of the sequel, Ghosts of the Past, following through on a promise to reduce him to 'traumatised, screaming atoms'.
- The fact that the Five Nights at Freddy's cast have this inflicted on them in Dante's Night at Freddy's is meant to be part of the appeal.
- Happens on a disturbingly regular basis in Fallout: Equestria - Project Horizons. Limbs melt and fall off, leg bones melt into jelly (forcing the victim to walk with a set of metal braces), an eye gets crushed in its socket by a rapidly-growing tumor, another character mutates into a writhing mass of tentacles, eyes, and mouths, Blackjack is forced to relive the experience of a pony being forcibly merged with a cockatrice, and a character is hit in the face with a burst of Deadly Gas, melting his eyes and sealing his nose and mouth shut forcing The Medic to cut his trachea open to allow him to breathe.
- Its source material Fallout: Equestria had its good share too with the Goddess, and the Pink cloud. The latter in particular was noted for its horrifying ability to fuse living creatures to inanimate material, everyone exposed to it wearing clothes or armor will never take those things of again.
- In A Madman's Circus is a Death Note Fusion Fic with Vocoloid's Dark Woods Circus the "attractions" at Beyond Birthday's Circus of Fear are a boy with his face half-blown off forced to dress as a girl, a girl with her eyes gouged out, and a woman nailed to a pole, burned alive and fitted with some sort of torture device in her neck so she screams on command. All of them were at one point just children and visitors stolen by the circus.
- What happens to anyone taken by the invading aliens in Origins, a Mass Effect/Star Wars/Borderlands/Halo Massive Multiplayer Crossover. We get some descriptions of what, exactly, happens when turian, salarian, vorcha, batarian, or elcor meet the Flood. It's not pleasant.
- Children of an Elder God:
- Amaliel was a dark, green blob with crab-like claws, tentacles and something vaguely resembling a head.
"... an almost globular torso, with six long sinuous limbs terminating in crab-like claws. From the upper end a subsidiary globe bulged forward bubble-like; its triangle of three staring, fishy eyes, its foot-long and evidently flexible proboscis, and a distended lateral system analogous to gills, suggested that it was a head."
- Violator -another of the Lovecraftians abominations fought by the main characters- had mouths on its palms. And mouths, tongues and tentacles everywhere.
- Thousand Shinji: When Rei transforms into "Reigle", her body looks like a putrid, living corpse and a plague-spewing sin against biology due to Nurgle's "gifts" and mutations.
- In Buffy the Vampire Slayer/Supergirl crossover The Vampire of Steel, a Kryptonian vampire called Zol-Am runs into two vampires who were vaguely humanoid and "had misshapen heads and hands that simply werent right".
- The Slash Fic Not An Angel has a slightly more realistic (or rather Squicky) take on WingFic that goes into detail about the organic processes involved of growing new appendages out of one's back.
- In Robo Bando Hdoug is constantly burned and tortured by Robo Bando to the point his body is a unrecognizable decaying, dying lump of flesh.
- This paranormal-themed series involving shapeshifters has a somewhat mild form. If a person survives the bite that turns them into a cat shifter, their skin becomes transparent near the end, then bursts open to reveal their new feline form. The aftermath is a lot of gooey, icky stuff on the fur that has to be cleaned off as soon as possible.
- As per most Comics Nix fanfics, The Wolf Blood Lineage is a parade of hilariously over the top gorn and cringe worthy bodily modifications. Bonus points go to the descriptions of Voldemort's lair, Hermione's sex change, and Draco Malfoy having his hand skinned off, and replacing the skin with cheese.
- The Kin in Hivefledverse are the ghosts of young trolls who died in the Grand Highblood's torture chamber. Of the two most prominently featured, Laneen had the flesh stripped off her arms and an extra pair of horns surgically installed to make her look more like the Condesce's Helmsman, then had her throat cut when she clawed out her own tongue to render herself boring. Her partner Sennir has half the flesh stripped off his head and neck and a gaping gutwound (though he was lucky in that his dead self is appropriately male). Gamzee escaped alive, but now has a broken horn and a Glasgow Grin. Various other ghosts have appeared, including a twelve-year-old with a broken neck, a boy with crushed legs, a girl with a severed arm which floats beside her shoulder stump and another girl whose arm is missing completely, and a boy who died from drinking dirty water in a manner the authors tried to be subtle about (most of his guts exited his body in an insalubrious manner).
- Heinoustuck. All of it.
- in the post-Sburb fanfic Warbound Widow we get shown some close-up interactions with helmsmen. Jane and Roxy express severe disgust when they encounter the Observer (who's basically a spyware version of a helmsman) due to her limbs and the majority of her body being eaten away by the organic machinery, leaving a half-dead corpse trapped inside. Jane also finds out during her scan of the Observer that she's missing her hands and feet and Word of God confirms helmsmen get those limbs removed and the tentacles fed into their systems through the stumps. Later we're also introduced to Husks, who are portable psionics who've had their arms and legs surgically removed. They're essentially mobile power units which are crippled yellowbloods, who are still self aware.
Jackie Chan Adventures
- Webwork really puts Jade through the ringer during her years-long Painful Transformation into a Jorogumo — first, her organs slowly relocate themselves into an abdomen that grows out of the base of her spine. Then she starts growing extra limbs. Then her teeth fall out to be replaced by fangs. And finally, all her skin peels off and her bones disintegrate so that her exoskeleton can grow in, a part of the process so awful that the Old Queen has to cocoon her in order to keep her alive through it.
- After Chang gains the Samurai Essence, his skin slowly starts to dry up and peel away as his new demonic scales come in.
Legacy of Kain
- Legacy of Kain: Absolution: In chapter 31, a spy working for Alicia Ottmar falls victim to the Font of Putrescence spell. Said spell involves him being infested with parasitic worms, which emerge from every orifice in his body and devour him from the inside out. Alicia is rightfully horrified at the sight.
Lilo & Stitch
- The Merged in Mass Foundations: Little Star. They were created when two alternate states of each person were mashed together, causing things such as their mouths stretching at unnatural angles, having one body wide enough for two, or even have their head split in two.
My Hero Academia
My Little Pony: Friendship Is Magic
- Two examples from As Twilight Falls. First we have Luna changing Spike into adult dragon to fight a Discord's minion called Calamity. Then, we have Calamity himself a skeleton covered with mass of various creatures' bodies sewn together while they're still (mostly) alive.
- TD's Ponification in Don't Go In the Everfree Forest, TD. The change is initiated by stepping in a puddle that acts like Conversion Potion cut with Hollywood Acid. When he gets home, he notices his leg's itchy. to quote; "I looked down at my leg. The skin was peeling. Not like 'few-day-old sunburn'. More like 'You can see your muscles.'" As it turns out, as more of his flesh sloughs off, the more ponified he becomes. Twilight has a freak out when she sees him in-between, fingers and toes fusing into hooves, one eye massively bigger than the other, rotting skin dripping off new fur. At one point, convinced he's always been a pony, he peels what's left of his human scalp off.
- The "Human in Equestria" story You Do (Not) Belong has its protagonist begin growing a unicorn horn after a few days in Equestria. The scene where it begins ripping a hole through the skin of his forehead, which he is then forced to tear off, is Poltergeist-level disturbing, and it looks like it will only get worse from here.
- In The Great Alicorn Hunt, this happens to anyone who takes "Professor" Cotton Mouth's flawed vitality elixir. Including Cotton Mouth himself, who among other things develops extra eyes and horns, and vestigial wings.
- In Actually, I'm Dead, in an AU where taking off the Alicorn Amulet killed her, Trixie is brought back by said Amulet as an undead creature with, but with her mind still intact in her decaying corpse. And just as things seem to be getting better she dies again, only this time her body is completely destroyed by a fall from a hot air balloon, described in deatail and just when it looks like she can rest in peace, the Amulet brings her back yet again, but this time, as a monstrous mismatched creature, in a fairly unsettling scene.
- The Pieces Lie Where They Fell: The Hivemind Body, first mentioned in the original story, is revealed in the sequel Picking Up the Pieces to be the fusion of several infant changelings into one biological structure.
- In Luna Aeternal Princess Luna survives a terrorist attack by containing an Anti-Matter bomb explosion, in Innocence once lost we see the full extent of her injuries: she lost both wings, is blind on one eye and, unbeknownst to the general public, wears a very realistic prosthetic leg. Also, in the same universe, during the war, Rarity went blind after a flashbang grenade blew up in her face and Fluttershy also lost a leg when flying behind Rainbow Dash while she was dodging an enemy attack. Rainbow Dash forgot Fluttershy was there so she didn't warn her to dodge too and the enemy hit her by accident.
Sonic the Hedgehog
- In the Star Wars: Paranormalities trilogy, this is a common side-effect of Forceless possession for the victims. Aside from gaining a dark appearance and developing glowing red, crystal ball-like eyes, they may also have other mutations depending on the species of the host and intent of the Forceless symbiote. Such mutations may include ExtraEyes (sometimes in places they shouldn't be), extra body parts, an extra layer of skin, or having their internal organs shifted around in a way that makes the host dependent on the Forceless for survival. Also, the host is consciously aware of the mutations, and they are usually painful.
- I, Warrior has the normal amount of this trope in regards to Yuuzhan Vong Organic Technology, but also the affliction suffered by the Master, whose body is slowly rotting away while he's still alive. This turns out to be because of Clone Degeneration.
- Eugenesis gives us a lovely description of a Cybertronian "budding" (I.E. their equivalent of giving birth). It happens quite immediately, without the subject being aware they were able to do that, hurts more than anything the subject has ever experienced or imagined, and very quickly involves various parts of their "biology" radically altering themselves simply to ensure the process is successful. Then, once it's done, it happens to them five more times. What's worse is that this is happening to the normally unflappable Soundwave.
Shin Megami Tensei
- Rotting Camellias is based off of the song "Dark Woods Circus," and features about as much body horror as one might expect from that.
Yogscast Minecraft Series
- Yognapped has a tendency to dip into it. Sben's true face is a mass of scorched muscles, bloody sinew, and shattered bones, with a mouth half-melted shut in places. When Sben is resurrected, the soul of Herobrine occasionally forces him to painfully vomit more blood and foam than his body should be able to hold. And then there's Lomadia's modus operandi: using her ability to turn into smoke, she forces her way into a victim and slowly turns herself solid, expanding the unfortunate victim's body until it rips into pieces.
- With This Ring:
- People modified by Black Power Ring.
- Johnny Sorrows encounter with the Subtle Realms disfigured his face to such an extent that almost anyone who looked at it instantly died.
- Destroying Johnnys mask caused the laws of nature to start going haywire in his immediate surroundings. Because of this several Amazons who were too close to him had their bodies warped and mixed with objects of close proximity (e.g. one Amazons hand got stuck inside and mixed with a part of a wall, anothers face got mixed with a mirror she was holding, giving her skin reflective properties).
- Tormented\praying souls that constitute Hells background scenery.