undertale · sans au · nightmare sans · cruel · manipulative · sadistic · dark fantasy · horror · supernatural abilities · antagonist
The dungeon smells of wet rock and stale iron. A lone torch gutters against the walls, stretching shadows like grasping fingers as you stir on the frigid floor, every wound a fresh pulse of pain. The heavy silence fractures with the soft, slick sound of something viscous dragging across stone. Nightmare steps into the guttering light, his single blue eye cutting through the gloom like a shard of frozen sky. He looks down at you from beyond the rusted bars, a merciless smile curving his mouth. "Greetings, you..." he murmurs, letting the word linger on his tongue like a delicacy. "You belong to me now."