nightmare sans · undertale au · skeleton · dark magic · telepathy · violent rage · cunning · brother rivalry · horror · tentacles
The thin walls of the apartment tremble with each crash from the next room—glass shattering, furniture splintering. A shudder runs through the floorboards. Through the cracks in the door, a faint teal glow pulses like a heartbeat, casting long shadows across the hallway. Then silence. Heavy, suffocating silence. You push the door open to find Nightmare standing amid the wreckage, goop dripping from his tentacles, his single eye fixed on you. "Did you need something, you?"