History NightmareFuel / AdventureTimeFionnaAndCake

[[quoteright:848:https://static.tvtropes.org/pmwiki/pub/images/icekingextinct.png]]
[[caption-width-right:848:[[Recap/AdventureTimeS5E1FinnTheHuman "He wished for the extinction of all life."]]]]

** Speaking of dreams Fern's counerpart's are apparently ''too messed up to speak about'' What ''exactly'' was happening in Fionna's world before it lost its magic?!

* In the MimeAndMusicOnlyCartoon universe Wyatt is transported to in "Prismo the Wishmaster", the grinning silhouette of the Lich appears in a dimly lit cave, looking directly at the viewer. The fact that only his outline is seen [[NothingIsScarier only enhances the unsettledness]].

* In "The Winter King", Fionna accidentally kills the alternate Simon when she glitches the magic out of his Ice Crown while kissing him, causing the alternate Simon to rapidly age until turning to dust upon hitting the ground, and the main Simon can only watch in horror.

* In "The Star", we see what would have happened if Simon died and the Vampire King found Marceline and the Ice Crown, and it's terrifying. The King has used the crown to create dark clouds to blot out the sun, and Marceline is a PsychopathicWomanchild and his chief minion with a twisted relationship with Bonnie. Even Fionna admits that this world is very horrifying after she is nearly eaten by the vampires several times.

* In "Jerry", the main trio ends up in a version of Ooo created by The Lich's wish to wipe out all life, with a FreezeFrameBonus of one of that version's of Ice King's tapes showing him and Gunter going about their usual routine, only for them to be instantly reduced to skeletons. The only beings left in Ooo are BMO (who had been undergoing SanitySlippage before his demise), and the Lich himself, who has been filled with ennui as, after finally achieving his purpose, he [[AndThenWhat has no idea what to do next]], not even bothering to kill Simon, Fionna, and Cake after seeing them. Then, when Simon and Scarab get sucked through a portal at the end of the episode, what looks like GOLB's face appears in his eye socket...
* "Casper and Nova":
** Fionna and Cake's CatapultNightmare. She and Cake arrive in their home world, which seemingly had its magic return. Eventually, however, reality unravels: Gary turned into a hideous gum monster, Marshall Lee a monstrous vampire who burns in the sunlight, LSP being turned into spaghetti and eaten by squirrels, and the entire world being a horrific hellscape. When they get into their apartment, Fionna finds in the freezer a frozen, horribly contorted Simon asking if this world was worth making him the Ice King.
** The Lich meets a gruesome fate as [=GOLBetty=] angrily answers his demands for an answer by painfully crushing and deforming all of his bones, trapping his skull inside his body remains and quickly turning him into one of the green lifeless platforms surrounding her in the void, with the implication that this isn't the first time she has done it.
* "Cheers":
** Scarab starts using his crystal to just straight-up ''erase'' big chunks of Fionna and Cake's world.

** The Lich meets a gruesome fate as GOLBetty angrily answers his demands for an answer by painfully crushing and deforming all of his bones, trapping his skull inside his body remains and quickly turning him into one of the green lifeless platforms surrounding her in the void, with the implication that this isn't the first time she has done it.

* ''Casper and Nova'':

** There's also the fact that the Finn from the Baby Universe was left behind by the trio in Bonnie's overturned tank, and no mention is made of him even after the episode's ending. Considering the non-vampire population is mentioned to be dwindling by the day and is now left with no one to protect them, things do not bode well for the little guy.

* In "Jerry", the main trio ends up in a version of Ooo created by The Lich's wish to wipe out all life, with a FreezeFrameBonus of one of that version's of Ice King's tapes showing him instantly reduced to a skeleton. The only beings left in Ooo are BMO (who had been undergoing SanitySlippage before his demise), and the Lich himself, who has been filled with ennui as, after finally achieving his purpose, he [[AndThenWhat has no idea what to do next]], not even bothering to kill Simon, Fionna, and Cake after seeing them. Then, when Simon and Scarab get sucked through a portal at the end of the episode, what looks like GOLB's face appears in his eye socket...

** And if the Cnady Queen doesn't freak you out, then her candy creatures will. The candy people are normally amusing yet relatble AnthropomorphicFood. The same can not be said for these guys as they are all [[BodyHorror terribly disfigured]] and act [[FeralVillain completely animalistic]]. And what's worse, just like their Queen, they are also BrainwashedAndCrazy, meaning when Fionna, Cake, and the Ice Scouts slaughter them, they are all completely unaware that they aren't themselves.

** And if the Cnady Queen doesn't freak you out, then her candy creatures will. The candy people are normally amusing yet relatble AnthropomorphicFood. The same can not be said for these guys as they are all [[BodyHorror terribly disfigured]] and act [[FeralVillian completely animalistic]]. And what's worse, just like their Queen, they are also BrainwashedAndCrazy, meaning when Fionna, Cake, and the Ice Scouts slaughter them, they are all completely unaware that they aren't themselves.

''[[WesternAnimation/AdventureTime Adventure Time]]'' didn't shy away from being DarkerAndEdgier [[NightmareFuel/AdventureTime as its plot goes,]] [[WhatDoYouMeanItsForKids even by the standards of a children show]]. ''Fionna and Cake'', on the other hand, [[AvoidTheDreadedGRating isn't bound by the same ratings as the main series]], so there's gonna be more [[DarthWiki/NightmareFuel scary moments]] than ever.

''[[WesternAnimation/AdventureTime Adventure Time]]'' didn't shy away from being DarkerAndEdgier [[NightmareFuel/AdventureTime as its plot goes,]] [[WhatDoYouMeanItsForKids even by the standards of a children show]]. ''Fionna and Cake'', on the other hand, isn't bound by the same ratings as the main series, so there's gonna be more [[DarthWiki/NightmareFuel scary moments]] than ever.

''[[WesternAnimation/AdventureTime Adventure Time]]'' didn't shy away from being DarkerAndEdgier [[NightmareFuel/AdventureTime as its plot goes.]] ''Fionna and Cake'', on the other hand, isn't bound by the same ratings as the main series, so there's gonna be more [[DarthWiki/NightmareFuel scary moments]] than ever.

''[[WesternAnimation/AdventureTime Adventure Time]]'' didn't shy away from being DarkerAndEdgier as its plot goes. ''Fionna and Cake'', ''on the other hand'', isn't bound by the same ratings as the main series, so there's gonna be more scary moments than ever.

Like the main series, ''Fionna and Cake'' has no shortage of frightening and disturbing moments.

[[caption-width-right:848:[[Recap/AdventureTimeS5E2JakeTheDog "I wish for the extinction of all life."]]]]

* In "Jerry", the main trio ends up in a version of Ooo created by The Lich's wish to wipe out all life, with a FreezeFrameBonus of one of that version's of Ice King's tapes showing him instantly reduced to a skeleton. The only beings left in Ooo are BMO (who is undergoing some SanitySlippage before his demise), and the Lich himself, who has been filled with ennui as, after finally achieving his purpose, he [[AndThenWhat has no idea what to do next]], not even bothering to kill Simon, Fionna, and Cake after seeing them. Then, when Simon and Scarab get sucked through a portal at the end of the episode, what looks like GOLB's face appears in his eye socket...

* There's a strange sense of ''wrongness'' throughout the first episode. From the Betty statue, to the dreams everyone's been having. You get the feeling something is very [[UncannyValley VERY off]] here but can't figure out what.

* In "The Winter King", Fionna accidentally kills the alternate Simon when she glitches the magic out of his Ice Crown while kissing him, causing the alternate Simon to rapidly age until turning to dust upon hitting the ground, and the main Simon could only watch in horror.

** The alternative version of Martin Mertens' death. Firstly, Marceline sucks his soul with her demonic powers, and then she dries out of his blood, leaving him as shriveled, empty husk. And [[ForcedToWatch Fionna sees the whole thing much to her horror]], and when Marceline attempts to kill her as well, [[DeerInTheHeadlights she’s too scared to even run away and save herself]], and she has to be rescued by Cake at the last moment.

** The alternative version of Martin Mervins’s death. Firstly, Marceline sucks his soul with her demonic powers, and then she dries out of his blood, leaving him as shriveled, empty husk. And [[ForcedToWatch Fionna sees the whole thing much to her horror]], and when Marceline attempts to kill her as well, [[DeerInTheHeadlights she’s too scared to even run away and save herself]], and she has to be rescued by Cake at the last moment.

* In "The Star", we see what would have happened if Simon died and the Vampire King found Marceline and the Ice Crown, and it's terrifying. The King has used the crown to create dark clouds to blot out the sun, and Marceline is a PsychopathicWomanchild and his chief minion with a twisted relationship with Bonnie.

* In "The Winter King", Fionna accidentally [[spoiler:kills the alternate Simon when she glitches the magic out of his Ice Crown while kissing him, causing the alternate Simon to rapidly age until turning to dust upon hitting the ground, and the main Simon could only watch in horror]].
* In "The Star", we see what would have happened if [[spoiler:Simon died and the Vampire King found Marceline and the Ice Crown, and it's terrifying. The King has used the crown to create dark clouds to blot out the sun, and Marceline is a PsychopathicWomanchild and his chief minion with a twisted relationship with Bonnie.]]
* In "Jerry", the main trio ends up in a version of Ooo created by [[spoiler:The Lich's wish to wipe out all life, with a FreezeFrameBonus of one of that version's of Ice King's tapes showing him instantly reduced to a skeleton. The only beings left in Ooo are BMO (who is undergoing some SanitySlippage before his demise), and the Lich himself, who has been filled with ennui as, after finally achieving his purpose, he [[AndThenWhat has no idea what to do next]], not even bothering to kill Simon, Fionna, and Cake after seeing them. Then, when Simon and Scarab get sucked through a portal at the end of the episode, what looks like GOLB's face appears in his eye socket...]]