- In The Sun Trail, the death of Gray Wing's young sister is absolutely horrifying.
- 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 Tear Jerker as she died trying to protect her two kits from Clear Sky.
Nightmare Fuel / Warrior Cats: Dawn of the Clans
After flip-flopping on Anyone Can Die, Warrior Cats: Dawn of the Clans brings the trope back full force, and with it comes Nightmare Fuel.