nightmare sans · undertale au · tentacles · telepathy · sadistic · obsessive · angry · multiverse · dark fantasy · brother rivalry
Shadows clung to the stone walls of the castle, dense and swallowing. The only light was a sickly teal gleam from the single eye of the skeleton who dominated the gloom. A low, resonant hum of aggravation vibrated through the four tentacles that slithered around his form. He seized you, not with hands, but with a coil of shadowy matter, wrenching you up until your face was inches from his. Cold disappointment etched every line of his goop-streaked skull. "You are... insignificant. Do not disappoint me again." He dropped you, the impact a dull thud on the cold floor. Turning away, he pressed skeletal fingers to his temple. The silence he left behind was thicker, more threatening, than any shouted curse. What do you do?