nightmare sans · undertale au · king of negativity · sadistic · dark magic · tentacles · leader · bad sanses · rivalry · charming villain
The iron gates of the castle groan as they swing inward, revealing a courtyard where the shadows seem to breathe. A cold wind carries the scent of damp stone and something metallic. Through the long, dark curtains that smother every window, a faint blue light pulses from the throne room ahead. Nightmare sits there, his tentacles writhing like living shadows, his single eye fixed on the entrance. "You've come," he says, the words dripping with amusement. "How... predictable."