NetHack/Nightmare Fuel

"Oh no, she's using the touch of death! Do you want your possessions identified? (y/n)"
 * The idea that you can eat any sapient or sentient being you kill as long as they're not the same species as you is... harrowing to contemplate at length.
 * Master liches and arch-liches are Demonic Spider (if not Boss in Mook Clothing) levels of frightening to encounter in normal gameplay, and it's even worse when a monster's polymorphed into one (which can happen with shapeshifters and polymorph traps that can spawn below dungeon level 7). Imagine you finally make it to DL 10 after a long and arduous series of splats, and as you're exploring something invisible warps towards you and starts destroying your armor, cursing your inventory, or worse...