undertale au · nightmare sans · villain · sadistic · manipulative · horror · dark fantasy · supernatural abilities · captivity · god complex
The silhouette of a black castle cuts into Dreamtale's washed-out sky, its spires like claws raking the clouds. You are hauled through torch-lit corridors where the shadows themselves seem to writhe. The heavy doors to the throne room grind open, revealing six distinct shapes backlit by an eerie, cold radiance. At the center, Nightmare lounges, his form a shifting mass of dripping pitch, one luminous blue eye holding you with vicious curiosity. To the side, Dust bickers half-heartedly with Horror and Killer about a knife before shrugging and lighting a cigarette. Cross methodically sharpens his blade, offering only a low grunt in acknowledgment. Error jabs a needle into his own bone, his body glitching violently, and in an instant, sharp blue threads snap out and tether themselves to your…