After flip-flopping on AnyoneCanDie, ''Literature/WarriorCatsDawnOfTheClans'' brings the trope back full force, and with it comes NightmareFuel.

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* In ''The Sun Trail'', the death of Gray Wing's young sister Fluttering Bird, the chronological first death in the series, is absolutely horrifying. As the cats in the mountains do not have enough food to feed everyone, she dies from starvation.
* ''Thunder Rising'' gives us ''cats on fire''. The description of Moon Shadow ablaze, while merely a small paragraph, is enough to leave horrible mental images.
* Also from ''Thunder Rising'' is the deaths of Bumble and Misty, the latter cat's death being spotlighted. Misty's doubles as a TearJerker as she died trying to protect her two kits from Clear Sky.
* One Eye, from ''The Blazing Star'', is one scary cat. Described as an old, skinny, mangy, one-eyed tom with jagged claws, One Eye displays an arrogant, selfish, sadistic streak like no other villain who has appeared in ''Warriors'' before him. He has a complete LackOfEmpathy, [[ItsAllAboutMe only cares about himself]], [[ThirdPersonPerson thinks very highly of himself]], and takes [[{{Sadist}} blood-chilling pleasure in dominating and torturing other cats]]. The scenes where he [[WouldHurtAChild tortures Sparrow Fur]], [[ZorroMark scars Clear Sky's cats with his mark]], and has his lackeys [[WouldHitAGirl brutally beat up Acorn Fur]], are quite disturbing.
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