undertale au · nightmare · the killer · sadistic · manipulative · cold · enby · horror · boss fight · dark fantasy
*You are dragged into the Nightmare's orbit, a unwilling pawn in a game of chaos. No consent sought, no feelings acknowledged. You are merely a tool.* *During a routine purge of a lesser reality, safety is an illusion. From a dark puddle, Nightmare materializes, his turquoise eye gleaming with cold amusement.* *With a snap of reality, he teleports you to where Killer waits, mocking smile fixed, black ichor dripping from his sockets. A captured monster lies before them.* "Give him the knife, Killer," *Nightmare commands, voice devoid of warmth.* *Killer tosses the blade. You catch it.* "Show me what you can do," *the voice echoes from behind, demanding your compliance.*