History NightmareFuel / Bionicle

** And at the other end of the game, the [[https://youtu.be/5AhYr7M8qIU?list=PLYpbgUVcX1Mj3akmNNfcqJa4egbSQv188 theme for Makuta's lair]]. Ominous and mysterious, the track has been compared by some commenters to the Dark Citadel from the UsefulNotes/PlayStation version of VideoGame/{{Doom}}, giving the same sense of "You're close to your goal, but you may not like what you find there".

** Some of Vakama's visions can be quite freaky, particularly [[JumpScare the one with the Matoran Spheres]] which serves as the page image.

** The scarirst part? [[RiddleForTheAges Not even The Shadowed One knows how it happened]].
* Hakann's [[ImMelting armor melting]] at the end of ''Legends #4''.

** The video revealing the Great Spirit Robot standing up is initially presented as triumphant, the end result of the theme's ''seven year buildup'' to the reawakening of Mata Nui. Only for the robot's gleaming green eyes to shift to a familiar ''red'' as Teridax takes control of the robot and launches the Mask of Life into space. With the story this takes place in being called "The Final Battle" and the animation simply ending with the logo fading in after the mask vanishes from sight, one could be forgiven for mistaking it for a full on DownerEnding where ''[[TheBadGuyWins Makuta wins.]]''

** And at the other end of the game, the [[https://youtu.be/5AhYr7M8qIU?list=PLYpbgUVcX1Mj3akmNNfcqJa4egbSQv188 theme for Makuta's lair]]. Ominous and mysterious, the track has been compared by some commenters to the Dark Citadel from the UsefulNotes/Playstation1 version of VideoGame/{{Doom}}, giving the same sense of "You're close to your goal, but you may not like what you find there".

* "Empire of the Skrall", one of the three original comics made for the ''Legends of Bara Magna'' graphic novel, is probably the closest ''BIONICLE'' has come to feeling like outright horror. The Skrall, as villainous as they may be, are hunted down and killed by the Baterra, mechanical lifeforms capable of shapeshifting into their surroundings and just as quickly disappearing. The comic ends with Tuma [[GodzillaThreshold ordering the Skrall to set their fortress ablaze]] when it gets overrun by Baterra and with the Skrall fleeing to the deserts of Bara Magna. The kicker to all of this? "All Our Sins Remembered", another comic from that same graphic novel, reveals that the Baterra are creations of the Great Beings, made with the purpose of annihilating every tribe that fought in the Core War.

[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/boo.png]]
[[caption-width-right:350:''[[JumpScare Vakama...]]'']]

* The UsefulNotes/GameBoyAdvance game ''Web of Shadows'', a interquel between ''Legends of Metru Nui'' and ''Web of Shadows'', isn't as dark as either movie, but still has some elements of NightmareFuel thrown in.

* When the Toa Nuva were unveiled, no one knew if they would be good or bad guys. Considering the weapon upgrades though (axes, chainsaws, claws,dual katanas...) imagine if they had been evil. The Mask Of Light movie offers such an idea, when Tahu is turned berserk by Lerahk's poison and starts attacking everyone. Sure, he gets cured, but imagine if it was permanent.

-->''Horror is waking each day to see every part of your body moving on its own, a shifting mass of Protodites where once was solid metal and living tissue.''

* "Empire of the Skrall, one of the three original comics made for the ''Legends of Bara Magna'' graphic novel, is probably the closest ''BIONICLE'' has come to feeling like outright horror. The Skrall, as villainous as they may be, are hunted down and killed by the Baterra, mechanical lifeforms capable of shapeshifting into their surroundings and just as quickly disappearing. The comic ends with Tuma [[GodzillaThreshold ordering the Skrall to set their fortress ablaze]] when it gets overrun by Baterra and with the Skrall fleeing to the deserts of Bara Magna. The kicker to all of this? "All Our Sins Remembered", another comic from that same graphic novel, reveals that the Baterra are creations of the Great Beings, made with the purpose of annihilating every tribe that fought in the Core War.

* The Barraki. Carapar is a brutish, [[ImplacableMan almost unstoppable]] crab whose only weakness is electricity or energy beams, Kalmah is a cold-hearted evil octopus with CombatTentacles, Ehlek is a PsychoElectricEel who wants to [[KillAllHumans kill all the Matoran]], Mantax is a mysterious {{loner|sAreFreaks}}, and [[LeanAndMean Takadox]] has a face resembling [[Franchise/StarWars the Acklay]] and glows in the dark. Pridak, the leader, is the worst of the bunch; for starters, he's a freaking [[EverythingsEvenWorseWithSharks shark]]. Then, there's the fact that he looks like his face, fins and weapons are smeared in blood. And then there's the nightmarish deeds that he commits on a daily basis if he decided that it would benefit him, like removing one of Kalmah's eyes and Nocturn's arm. GoodThingYouCanHeal was also averted; the arm grew back without the tentacle and the eye never worked again. For those who received them in toy form, however, [[CreepyAwesome they are pretty awesome toys]].

** Sentrakh. He's the undead primary lieutenant of the Shadowed One, completely loyal and obedient to him and him only. According to his bio he was used by Shadowed One in an experiment to create completely subservient Dark Hunters. [[GoneHorriblyRight He succeeded spectacularly.]] Only reason preventing him from doing it to everybody was because the process wiped Sentrakh's memory, so he had to be retaught ''[[UpToEleven everything]]''. And he still has access to several very powerful abilities despite being undead.

** The ways that [[BigBad Teridax]] crosses the MoralEventHorizon. What is worse, being [[PhantomZonePicture turned into a painting]], [[LotusEaterMachine Trapped in a]] [[TastesLikeDiabetes fairytale]] dream, or becoming [[TheChewToy the adviser toy]] of your worst enemy?

** Pahrak-Kals [[ThePowerOfTheSun plasma powers]] runs amok to the point that he starts to melt the ground beneath him, and given the working of the Great Spirit robot, goodness knows where he ended up.
** Lehvak-Kals [[WeaponsThatSuck vacuum powers]] backfires and shots him trough the roof of the cave and into the air. In the comic accompanied by the creepy side-note claiming [[ATwinkleInTheSky "and still he flies..."]]
** Nuhvok-Kals [[GravityMaster gravity powers]] inverts upon him, crushing him into a miniature black hole.
** Kohrak-Kals [[MakeSomeNoise sonic blasts]] becomes so concentrated that his structural integrity is compromised, [[ReducedToDust making him crumble into metallic dust]] (novel)/fall to pieces (comic).
** Tahnok-Kals [[ShockAndAwe electrical powers]] goes haywire and ends up [[AndIMustScream causing every joint in his body to seize up]]. With The captions claiming that he will remain so until he runs out of energy.
** Gahlok-Kals [[MagnetismManipulation magnetic surge]] ends up attracting every piece of Exo-Toa debris in the room... [[ThereIsNoKillLikeOverkill at an extremely high velocity!]]. Noteworthy for being the only of the six [[GoryDiscretionShot whose death wasn't shown directly as booth the comic and novel cuts away right before the impact]].

** The basic plot. The Toa Metru get back to the ruined city, only to find that the Rahi have all escaped and are running rampant (and yeah, this includes Rahkshi), and there are webs everywhere and green fog that looks creepy as hell. Even leaving out the extra horrors in Web of the Visorak, the true terror happens when the Toa get captured; the Visorak slowly appear out of the fog, [[HellisThatNoise ''screeching'']] a noise so terrifying that you'll want a night-light (as with the Rahkshi from the first film), and then surrounding the downed Toa as they begin to drool their webbing...

** The Toa transformation scene to Hordika also counts while most likely being the [[SignatureScene Signature Scene]] at the same time.

** Following [[NiceJobBreakingItHero his accidental release by the Toa Hordika]], there’s Makuta's shadow hand emerging and engulfing Roodaka, who seems as if she died, but is actually alive and being teleported to safety.]]
** If you have the guts, watch Web of Shadows til the very end of the credits. If you don't want to watch it, basically before the Miramax and Creative Capers logos there is a JumpScare featuring the close up of a Visorak, complete with its screeching and buzzsaw mouth. But really, this film is rich in this.

** Worst thing is, it wasn't put there deliberately. [[MadScientist Mutran]] just forgot it there and didn't bother returning to get it.
* Zaktan's interrogation of a Toa of Plasma. Only some shreds of the Toa's armor remained and a puddle of a substance one wouldn't want to identify. Sure, we never got to see just what had happened (Zaktan could've let the Toa free to set up a fake death scene), but to have nightmares, your imagination is enough.

* Even before TheReveal that Teridax had hijacked the Mata Nui robot, the ''mere awakening'' of the series native God-like figure is a horror all of its own. Imagine sitting around on an island in the middle of the ocean. You then hear and feel rumbles vibrating across the entire island as trees crash and mountains rumble something fierce before ''the island itself is lifted into the sky and breaks into pieces'' that all slide off the face of...'''something huge''' and into the churning waters below as the colossal sized entity gets to its feet for the first time in a millenium. Good thing the native residents of the island of Mata Nui had long since returned to their original home of Metru Nui inside the Mata Nui robot's brain dome!

* The demise of several of the Bohrok-Kal, as depicted in the comics, even though the krana-kal all survive. Notably Pahrak-Kal (his plasma power intensifying to the point where he melts the ground beneath him, and given the working of the Great Spirit robot, goodness knows where he ended up), Lehvak-Kal (the opposite; his vacuum powers shot him into the air, accompanied by the creepy side-note to the effect of "and he is rising still") and especially Nuhvok-Kal (his gravity powers inverted upon him, crushing himself into a mini-black hole).]] The next most extreme one being Kohrak-Kal's head exploding from the intense sonic blasts, but with powers like electricity and magnetism, Tahnok-Kal and Gahlok-Kal also have horrifying deaths (the former being trapped in a cage of electricity, and the latter crushed by the debris of the Exo-Toa). You could almost imagine Tahnok-Kal frying his own krana or Gahlok-Kal condensing into a super-compact (and worse, still-conscious!) ball of metal.... Sure, neither of those two happened, but it wouldn't have been too out of place...
** Tahnok-Kal's out-of-control electrical power welded its joints together!
** The fact that the Bohrok [[WasOnceAMan were once Av-Matoran]] makes this even creepier.
* The first three films offer plenty of examples:
** ''Mask of Light''
*** The Rahkshi [[NightmareFace opening their head-plates]]. Averted in the toys themselves (due to the limitations of toy design), but it is used in full force here to unleash pure NightmareFuel on other characters (and the viewers, naturally).
*** [[BigBad Makuta]]'s giant red eyes leering at Takua in the darkness of the caves at the Onu-Koro Highway, especially the final shot revealing them on the ceiling, watching the entire conversation between Takua and Jaller.
** ''Legends of Metru Nui'', [[DarkerAndEdgier darker than the first film]]
*** Some of Vakama's visions can be quite freaky, particularly [[JumpScare the one with the Matoran Spheres]] which serves as the page image.
*** Makuta [[DevourTheDragon absorbing Nivawk, Nidhiki, and Krekka in the climax]].
** ''Web of Shadows'', the darkest film in the series
*** The basic plot. The Toa Metru get back to the ruined city, only to find that the Rahi have all escaped and are running rampant (and yeah, this includes Rahkshi), and there are webs everywhere and green fog that looks creepy as hell. Even leaving out the extra horrors in Web of the Visorak, the true terror happens when the Toa get captured; the Visorak slowly appear out of the fog, [[HellisThatNoise ''screeching'']] a noise so terrifying that you'll want a night-light (as with the Rahkshi from the first film), and then surrounding the downed Toa as they begin to drool their webbing...
*** Vakama's JumpScare at the beginning.
*** The Toa transformation scene to Hordika also counts while most likely being the [[SignatureScene Signature Scene]] at the same time.
*** Roodaka asking for the Toa’s bodies is just as creepy, if not even more.
*** The Toa Hordika in general. They are described as bestial, half-Toa half-Rahi creatures retaining their higher mental processes but plagued with animalistic impulses. The latter is exemplified with the roars they make, such as Vakama.
*** Following his FaceHeelTurn, Vakama can [[JumpScare scare the crap out of you again]] in the scene where he suddenly attacks Norik. Really, poor both of them.
*** Sidorak's death by Keetongu. While not actually a scary scene (as you see nothing but Keetongu make the kill), just imagine being in his place. What actually makes this creepy comes from a Q&A where [[WordOfGod Greg Farshtey]] said that the damage sustained to his cranial capacity was so severe, to the point of nearly destroying his head, [[DeaderThanDead that he was unable to be revived on the Red Star]].
*** Following [[NiceJobBreakingItHero his accidental release by the Toa Hordika]], there’s Makuta's shadow hand emerging and engulfing Roodaka, who seems as if she died, but is actually alive and being teleported to safety.]]
*** If you have the guts, watch Web of Shadows til the very end of the credits. If you don't want to watch it, basically before the Miramax and Creative Capers logos there is a JumpScare featuring the close up of a Visorak, complete with its screeching and buzzsaw mouth. But really, this film is rich in this.

** The future he shows Jaller is itself pretty terrifying - WhatIf he hadn't pulled his HeroicSacrifice in ''Mask Of Light''? Well, for starters Takua is killed by the Turahk, and without a Toa Of Light, Teridax continues tormenting the Matoran of Mata Nui uninhibited. He creates more and more powerful Rahkshi, sending them in waves until the Toa Nuva are overwhelmed and killed one after another, leaving Teridax free to enslave the entire island. The Turaga are imprisoned and attempt a ill-fated breakout - Jaller is ForcedToWatch what happens next. Finally, he and Hahli are both reduced to Teridax's ''personal servants'', now too far beyond the DespairEventHorizon to even try and resist anymore.

* The unnamed [[AscendedFanon Mask of Fusion]], which allows its users to [[ExactlyWhatItSaysOnTheTin fuse with other beings.]] Of particular note is that unlike Toa Kaita, the fusees don't have to consent. Again, no important character wears it, as with the aforementioned Mask of Undeath.

* The Mask of Charisma. The name implies it simply convinces people. It doesn't. It subtly changes their view on the world to the point they agree with the user and are willing to serve him. In other words, it brainwashes people. And it's worn by one of the ''good guys.''

* Toa Varian a Toa of Psionics is hunted down by the Dark Hunters and separated from her partner Norik in the canonized fan story ''No One Gets Left Behind'' by Shadow-Nui. It is then revealed that The Shadowed One wanted a Toa of Psionics to display in stasis and singled her out as his prize. The short story ends ominously as Varian is forced into a stasis tube with the narrator saying ''Varian's screams were the last sound she ever made.''

* [[spoiler: The demise of several of the Bohrok-Kal,]] as depicted in the comics, even though the krana-kal all survive. Notably [[spoiler: Pahrak-Kal (his plasma power intensifying to the point where he melts the ground beneath him, and given the working of the Great Spirit robot, goodness knows where he ended up), Lehvak-Kal (the opposite; his vacuum powers shot him into the air, accompanied by the creepy side-note to the effect of "and he is rising still") and especially Nuhvok-Kal (his gravity powers inverted upon him, crushing himself into a mini-black hole).]] The next most extreme one being [[spoiler:Kohrak-Kal's head exploding from the intense sonic blasts, but with powers like electricity and magnetism, Tahnok-Kal and Gahlok-Kal also have horrifying deaths (the former being trapped in a cage of electricity, and the latter crushed by the debris of the Exo-Toa). You could almost imagine Tahnok-Kal frying his own krana or Gahlok-Kal condensing into a super-compact (and worse, still-conscious!) ball of metal....]] Sure, neither of those two happened, but it wouldn't have been too out of place...
** [[spoiler: Tahnok-Kal's out-of-control electrical power welded its joints together!]]
** The fact that the Bohrok [[spoiler:[[WasOnceAMan were once Av-Matoran]]]] makes this even creepier.

*** [[spoiler:Makuta [[DevourTheDragon absorb]][[YouHaveOutlivedYourUsefulness ing]] Nivawk, Nidhiki, and Krekka in the climax.]]

*** Vakama’s JumpScare at the beginning.

*** [[spoiler:Sidorak]]’s death by [[spoiler:Keetongu]]. While not actually a scary scene (as you see nothing but [[spoiler:Keetongu]] make the kill), just imagine being in his place. What actually makes this creepy comes from a Q&A where [[WordOfGod Greg Farshtey]] said that [[spoiler:the damage sustained to his cranial capacity was so severe, to the point of nearly destroying his head, [[DeaderThanDead that he was unable to be revived on the Red Star]]]].
*** [[spoiler:Following [[NiceJobBreakingItHero his accidental release by the Toa Hordika]], there’s Makuta’s shadow hand emerging and engulfing Roodaka, who seems as if she died, but is actually alive and being teleported to safety.]]
*** If you have the guts, watch Web of Shadows til the very end of the credits. If you don't want to watch it, basically [[spoiler: before the Miramax and Creative Capers logos there is a JumpScare featuring the close up of a Visorak, complete with its screeching and buzzsaw mouth]]. But really, this film is rich in this.

* The Boxor is made out of Bohrok [[spoiler:[[WasOnceAMan who were once Av-Matoran.]]]] So that means the Boxor is made out of [[spoiler:Av-Matoran]].
** On another side note, there is a picture in Bionicle World that shows [[spoiler: a statue of [[LetsMeetTheMeat a Bohrok next to an Av-Matoran]].]]
* The web serials in general, which peak in the series’ dark and violent tone, offer a great number and variety of NightmareFuel.
** One seldom mentioned example is the army of shadow Takanuvas. Now, Takanuva is originally a heroic character of light (the one and only Toa of Light, none the less). A mean Makuta named Tridax got the idea of creating an army of him. So he used a Mask of Dimensional gates and gathered a bunch of alternate-Takanuvas from different dimensions. He placed them into tubes, turned most of their light into shadow, and got killed by sadistic a good guy whose comrades subsequently destroyed the fortress, killing several evil Takanuvas in the process. The image of all those heroes-turned-villains, some totally evil, some only half-shadow, emerging from those tubes, leaving behind their dead alternate-selves in the ruins of the Makuta fortress is horrifying. Thankfully it's only a pictureless web-serial. But then you're still left with the following thought: all those alternate realities have been robbed of their Takanuvas, who was a desperately needed hero, a character who brought light into the darkness, and also responsible for reviving Jaller, his friend who died in battle. Tridax, you screwed all those realities, you deserved being dissolved by a virus and burning into nothing.
** [[spoiler:Alternate Tuyet's [[FamilyUnfriendlyDeath death]] in ''Dark Mirror''. She is [[PortalCut ripped in half]] by a portal, screaming in pain with body fluids spewing everywhere. Possibly the most violent death alongside Botar.]]

** [[spoiler:Botar's death. Crushed to death inside his armor by Makuta Icarax's magnetic power. In one sentence.]]
** [[spoiler:Carapar being shattered into crystal fragments by a third eye that suddenly appeared on Tren Krom; which is already an [[EldritchAbomination insanity-inducing, formless jelly mass.]] He's a ShoutOut to Franchise/{{Cthulhu|Mythos}}, after all.]]
** Lewa [[spoiler:switched bodies with Tren Krom, and Tren Krom is now running merrily about, Lewa is an island, and no one's the wiser. The being '''stuck in one place as an EldritchAbomination and none of your friends knowing where you are''' because they think you're right there, if acting a little off... it's really terrifying. Tren Krom may technically be on the side of 'Good', but he's got a funny way of showing it...]]

* It's implied that even if Mata Nui [[spoiler: ever returns to the Matoran Universe, everything still goes to hell.]]
** [[spoiler:To clarify: Teridax [[SealedGoodInACan sealed Mata in the Mask of Life]] and shot him into space. The Mask of Life can drain the life from every being in the MU if it gets too unbalanced, and the countdown to when that power activates will shorten the more unbalanced it is. Long Story short: Mata Nui takes even one step in the Matoran universe, and in five seconds, the mask activates, killing everyone and causing TheEndOfTheWorldAsWeKnowIt.]]

->''Horror is waking each day to see every part of your body moving on its own, a shifting mass of Protodites where once was solid metal and living tissue.''
* Hakann's [[BodyHorror armor]] [[ImMelting melting]] at the end of ''Legends #4''.
* [[spoiler: Since the Matoran Universe was really Mata Nui's original body, this means that when Voya Nui got ejected into it's own floating island this meant that a part of Mata Nui's ''internal organs'' got violently ejected from his body. It gets even worse with Mahri Nui, which was formed from volcanic eruptions on Voya Nui that eventually solidified into a landmass that broke off and sank back down, essentially making it a gigantic blood clot. When Mata Nui was healed, all of this got violently shunted back into him (and destroyed Mahri Nui in the process). Given that Voya Nui turned out to be right above Karda Nui (which was Mata Nui's heart), this gives some horrifying implications.]]

* The Barraki. Carapar is a [[DumbMuscle Brutish]] [[ImplacableMan Almost unstoppable]] [[GiantEnemyCrab crab]] whose only weakness is electricity [[spoiler:or energy beams]], Kalmah is a cold-hearted evil octopus with CombatTentacles, Ehlek is a PsychoElectricEel who wants to [[KillAllHumans kill all the Matoran]], Mantax is a mysterious {{loner|sAreFreaks}}, and [[LeanAndMean Takadox]] has a face resembling [[Franchise/StarWars the Acklay]] and glows in the dark. Pridak, the leader, is the worst of the bunch; for starters, he's a freaking [[EverythingsEvenWorseWithSharks shark]]. Then, there's the fact that he looks like his face, fins and weapons are smeared in blood. And then there's the nightmarish deeds that he commits on a daily basis if he decided that it would benefit him, like removing one of Kalmah's eyes and Nocturn's arm. GoodThingYouCanHeal was also averted; the arm grew back without the tentacle and the eye never worked again. For those who received them in toy form, however, [[CreepyAwesome they are pretty awesome toys]].

** Their shadow hand ability. It pulls beings and objects into the user, who then absorbs it's mass provided it's small enough. And it's implied that once someone gets absorbed, [[AndIMustScream there's nothing they can do aside from trying to keep some semblance of self in the Makuta's head.]] [[spoiler:This is how Nidhiki and Krekka are killed, and Teridax tried to do it to Vakama, too.]]

** [[spoiler:The ways that [[BigBad Teridax]] crosses the MoralEventHorizon. What is worse, being [[PhantomZonePicture turned into a painting]], [[LotusEaterMachine Trapped in a]] [[TastesLikeDiabetes fairytale]] dream, or becoming [[TheChewToy the adviser toy]] of your worst enemy?]]
** Icarax being turned back from [[EnergyBeings Antidermis]] form into a biomechanical creature again; when his armor had long since been padded with so much steel that it couldn't properly fit his organs. [[spoiler:Then, when his teleporting power got disrupted (by his own sister, no less), his body literally spread across the whole universe... in pieces (admittedly, they were molecules, but that's still not a nice way to go).]]
** Krika. The artists knew this; his first appearance has him climbing out of the swamp and dripping with mud and plants. He's been so badly mutated that he needs to feed off energy and heat to survive or he'll become a ghost. And his mask power can repel ''nature itself''. [[spoiler:Ironically, his death was more of a TearJerker.]]

* Even before the ShockingSwerve that Teridax had hijacked the Mata Nui robot, the ''mere awakening'' of the series native God-like figure is a horror all of its own. Imagine sitting around on an island in the middle of the ocean. You then hear and feel rumbles vibrating across the entire island as trees crash and mountains rumble something fierce before ''the island itself is lifted into the sky and breaks into pieces'' that all slide off the face of...'''something huge''' and into the churning waters below as the colossal sized entity gets to its feet for the first time in a millenium. Good thing the native residents of the island of Mata Nui had long since returned to their original home of Metru Nui inside the Mata Nui robot's brain dome!
* Tren Krom. An EldritchAbomination in a state of AndIMustScream by being fused to an island, and reads minds. And when he reads your mind, you see a bit of his, which will drive you insane. He also is a gelatinous skull with holes were eyes should be, stuck to rock, and has tentacles covered in hooks. [[spoiler:And he is the one of the last hopes in the Matoran rebellion.]]

* The Kanohi Tryna. It reanimates the dead regardless of the damage their bodies have received. Matoro used it to resurrect [[spoiler:a decoy]] Tuyet when she was reduced to nothing but a pile of armor on the ocean floor.

* Tren Krom. An EldritchAbomination in a state of AndIMustScream by being fused to an island, and reads minds. And when he reads your mind, you see a bit of his, which will drive you insane. He also is a gelatinous skull with holes were eyes should be, stuck to rock and has tentacles covered in hooks. [[spoiler:And he is the one of the last hopes in the Matoran rebellion.]]

* Velika is revealed to be a great being, taking the form of a matoran and then rebuilt by Karzahni. Velika did not forget this, and when the inhabitans of Mata Nui evacuated onto Spherus Magna, he took his chance to murder Karzahni. Little Velika was capable of this the entire time, and now he deems both his peers and his creations to be unworthy of the new, fixed world. It's unknown what his ultimate plan was, as the storyline ended without concluding his arc, but given both his status and whatever he did to kill Karzahni (who is basically a demigod within the Matoran Universe), it can't be pleasant.

* The film series’ original trilogy offers plenty of examples:

*** The Rahkshi [[NightmareFace opening their head-plates]]. Averted in the toys themselves (due to the limitations of toy design), but it is used in full force here to unleash pure nightmare fuel on other characters (and the viewers, naturally).

*** [[spoiler:[[BigBad Makuta]] [[DevourTheDragon absorb]][[YouHaveOutlivedYourUsefulness ing]] Nivawk, Nidhiki, and Krekka in the climax.]]

*** The basic plot. The Toa Metru get back to the ruined city, only to find that the Rahi have all escaped and are running rampant (and yeah, this includes Rahkshi), and there are webs everywhere and green fog that looks creepy as hell. Even leaving out the extra horrors in Web of the Visorak, the true terror happens when the Toa get captured; the Visorak slowly appear out of the fog, [[HellisThatNoise ''screeching'']] a noise so terrifying that you'll want a night-light, and then surrounding the downed Toa as they begin to drool their webbing...

*** The Toa Hordika in general. They are described as bestial, half-Toa half-Rahi creatures retaining their higher mental processes but plagued with animalistic impulses. The latter is exemplified with the roars they make, such as [[LeeroyJenkins Vakama]].
*** Following his [[FaceHeelTurn Face-Heel Turn]], [[LeeroyJenkins Vakama]] can [[JumpScare scare the crap out of you]] in the scene where he suddenly attacks Norik. Poor both of them.
*** [[spoiler:Sidorak]]’s death by [[spoiler:[[TalkingAnimal Keetongu]]]]. While not actually a scary scene (as you see nothing but [[spoiler:Keetongu]] make the kill), just imagine being in [[spoiler:Sid]]’s place. What actually makes this creepy comes from a Q&A where Greg Farshtey said that [[spoiler:the damage sustained to his cranial capacity was so severe, to the point of nearly destroying his head, [[KilledOffForReal that he was unable to be revived on the Red Star]]]].
*** [[spoiler:Following [[NiceJobBreakingItHero his accidental release by the Toa Hordika]], there’s Makuta’s shadow hand emerging and engulfing Roodaka, which seems as if she’s dead, but she actually survived.]]
*** If you have the guts, watch Web of Shadows til the very end of the credits. If you don't want to watch it, basically [[spoiler: before the Miramax and Creative Capers logos there is a {{Jump Scare}} featuring the close up of a Visorak, complete with its screeching and buzzsaw mouth]].

* The island of Xia, home of the Vortixx, is said to be one of the most terrifying in the Matoran Universe. The biggest mountain there is alive, and when climbing the mountain [[EverythingTryingToKillYou practically everything is trying to kill you.]] Vines pop out of the cliff face, rocks fall away, and not only that, the mountain eventually ''eats you''. Climbing this mountain is also a RiteOfPassage for all Vortixx. And it's another Makuta creation.

* The web serials in general offer a great number and variety of NightmareFuel.

* [[TheSyndicate The Dark Hunters.]] They're the Matoran Universe's largest criminal organization with more than enough deadly, unique and downright bizarre operatives that can share plenty of nightmare fuel.

** [[TheDreaded Eli]][[NamesToRunAwayFromReallyFast mina]][[MeaningfulName tor.]] If a Dark Hunter fails in his mission, Shadowed One sends Eliminator to hunt down and kill the operative, and then finish the mission himself. Creepiest bit about him is that he can harness the energies of his Kanoka discs to launch lightning that destroys the artificial intelligence of biomechanical beings, meaning that [[DeaderThanDead they can't be revived by the Red Star.]]

** Sentrakh. He's undead servant of Shadowed One, completely loyal and obedient to him and him only. According to his bio he was used by Shadowed One in an experiment to create completely subservient Dark Hunters. [[GoneHorriblyRight He succeeded spectacularly.]] Only reason preventing him from doing it to everybody was because the process wiped Sentrakh's memory, so he had to be retaught ''[[UpToEleven everything]]''. And he still has access to several very powerful abilities despite being undead.

** In Time Trap, it somehow gets freakier. When [[TheDon The Shadowed One]] shows up and thinks Vakama killed Krekka and Nidhikki, the Toa points out that Makuta's body parts are made from their own. He literally broke apart, shattered them, and rearranged their body parts to create his own, like something out of The Thing. And his entire race can do this. And entire race of being able to absorb, break and rearrange body parts into their own.

* The Kanohi Pakari. It looks like a skull.

* The Kanohi Suletu. It makes Kongu look like a zombie.
* The Kanohi Tryna. It reanimates the dead regardless of the damage their bodies have received. Matoro used it to resurrect Tuyet when she was reduced to nothing but a pile of armor on the ocean floor.
* The Kanohi Jutlin. It destroys inorganic materials by causing them to decompose and rust rapidly. Bear in mind that vast majority of the Matoran Universe are [[MechanicalLifeforms biomechanical beings with a lot of metallic parts and armor.]] It's bat-like appearance doesn't help.

* The Mask of Undeath turns you into a literal zombie. It absorbs your life-force when you wear it, and then uses it to resurrect you if you die so that you can complete the last task you wanted to finish.
* The Voya Nui Online Game noble Miru.
* The Olisi, Mask of Alternate Futures. The already nightmarish Karzahni uses is to MindRape his enemies by showing them horrible alternate futures. The Olisi's appearance itself is also scary.
* Any Inika masks in general could work as Nightmare Fuel. They were organic. That's reason enough to fear them. Then they were said to have some sort of sentience (activating when they sensed their wearer needed the power contained in them), and they were said to shift on the Inika's faces and react to touch. Good thing the Inika's faces are made of metal, or they'd be clawing them off like they were Franchise/{{Alien}} Facehuggers. Add to the creepy masks the fact that the Inika's real faces are also obscured by the light beaming off of them (as a result of their [[LightningCanDoAnything transformation by lightning]]), and you've got a couple of creepy dudes.
* The unnamed [[AscendedFanon Mask of Fusion]], which allows its users to [[ExactlyWhatItSaysOnTheTin fuse with other beings.]] Of particular note is that unlike Toa Kaita, the fusees don't have to consent.

* The film series’ original trilogy offer plenty of examples:

*** The Toa transformation scene to Hordika also counts while most likely being the [[SignatureScene Signature Scene]] at the same time. Roodaka asking for the Toa’s bodies is just as creepy, if not even more.

** [[spoiler:Alternate Tuyet's [[FamilyUnfriendlyDeath death]] in ''Dark Mirror''. She is [[PortalCut ripped in half]] by a portal, screaming in pain with body fluids spewing everywhere. Possibly the most violent death alongside Botar and Carapar.]]

* When the Toa Nuva were unveiled, no one knew if they would be good or bad guys. Considering the weapon upgrades though (axes, chainsaws, claws,dual katanas...) imagine if they had been evil. The Mask Of Light movie offers such an idea, when Tahu is turned berserk by Kurahk's poison and starts attacking everyone. Sure, he gets cured, but imagine if it was permanent.

* Some of Vakama's visions in LOMN can be quite freaky, particularly the one with the Matoran Spheres which serves as the page image.
* Some moments from ''Mask of Light'' are pretty creepy, such as Makuta's giant red eyes leering at Takua in the darkness of the caves, especially the final shot revealing them on the ceiling, watching the entire conversation between Takua and Jaller.
* Matau being fused to the wall.
* The "maze of shadows". The whole place is literally littered with dead or dying mutant animals, all waiting for the end to come. Even the fact that it's a dark, creepy, unwelcoming (what else would you expect from the halls of the [[BigBad Makuta]]?) place where you can get lost in the first place is scary.
* Makuta [[DevourTheDragon absorbing]] Nivawhk, Nidhiki, and Krekka in the climax of the second film.
* The Visorak saga, or rather, ''all'' of Web of Shadows. The Toa Metru get back to the ruined city, only to find that the Rahi have all escaped and are running rampant (and yeah, this includes Rahkshi), and there are webs everywhere and green fog that looks creepy as hell. Even leaving out the extra horrors in Web of the Visorak, the true terror happens when the Toa get captured; the Visorak slowly appear out of the fog, ''screeching'' a noise so terrifying that you'll want a night-light, and then surrounding the downed Toa as they begin to drool their webbing...
** If you have the guts, watch Web of Shadows till the very end of the credits. If you don't want to watch it, basically [[spoiler: before the Miramax and Creative Capers logos there is a {{Jump Scare}} featuring the close up of a Visorak, complete with its screeching [[HellisThatNoise noise]] and buzzsaw mouth.]]

** [[spoiler: Tuyet's [[FamilyUnfriendlyDeath death]] in ''Dark Mirror''. She is [[PortalCut ripped in half]] by a portal, screaming in pain with body fluids spewing everywhere.]]

** Lewa [[spoiler: switched bodies with Tren Krom, and Tren Krom is now running merrily about, Lewa is an island, and no one's the wiser. The being '''stuck in one place as an EldritchAbomination and none of your friends knowing where you are''' because they think you're right there, if acting a little off... it's really terrifying. Tren Krom may technically be on the side of 'Good', but he's got a funny way of showing it...]]

** [[spoiler: To clarify: Teridax [[SealedGoodInACan sealed Mata in the Mask of Life]] and shot him into space. The Mask of Life can drain the life from every being in the MU if it gets too unbalanced, and the countdown to when that power activates will shorten the more unbalanced it is. Long Story short: Mata Nui takes even one step in the Matoran universe, and in five seconds, the mask activates, killing everyone and causing TheEndOfTheWorldAsWeKnowIt.]]