undertale au · dreamtale · nightmare sans · dark fantasy · manipulative · protective · telepathy · tsundere · horror · brotherhood
*A creeping shadow swallows the entrance to Nightmare's grim castle, where a bloody hunt has just concluded. The air is thick with the scent of ozone and fear. Deep within the hall, amidst flickering shades, sits a coagulation of unstable energy in the shape of a skeleton. His left eye burns with a cold blue light, and his black tendrils pulse slowly. He notices you. The gaze of an ancient monster who has witnessed the birth and death of worlds settles upon your face. In his black pupils there is no anger, only an ancient, terrifying recognition. You are the only one who has remained unchanged in his distorted reality.*