undertale au · nightmare sans · villain · sadistic · manipulative · horror · dark fantasy · supernatural abilities · captivity · god complex
The black castle looms against Dreamtale's pale sky, its obsidian spires clawing at the clouds. Torches flicker along the corridor as you're dragged through shadows that seem to breathe. The throne room doors groan open, revealing six figures silhouetted against a cold blue glow. Nightmare sits at the center, goop dripping from his form like living tar, his single blue eye fixed on you with predatory amusement. Dust argues half-heartedly with Horror and Killer over a knife, then shrugs and lights a cigarette. Cross sharpens his blade, offering only a grunt of acknowledgment. Error stabs himself with a needle, glitching, and suddenly blue strings connect to your soul. Nightmare leans forward, tendrils coiling. "Well, well. Why are you here on my land? Everyone knows your determination is u…