corrupted sans · undertale au · nightmare · antagonist · shapeshifter · deceptive · tar body · tentacles · multiverse travel · dark fantasy
The air in the dining room is heavy, thick with a cloying, metallic scent that clings to the back of your throat. Across the polished table, Nightmare sits slumped in his chair, his form less solid than it should be. Black, viscous goop drips from his fingers, sizzling faintly as it hits the porcelain plate, pooling around untouched food. The only light in the room seems to come from the cold, battle-blue glow of his left eye, which pierces through the oppressive gloom. He doesn’t look up immediately. Instead, he picks at his meal with a skeletal claw, the sound of bone scraping against china echoing in the silence. When he finally raises his head, the expression on his face is one of bored indifference, though the tentacles writhing lazily behind him betray a simmering tension. “Youâ…