undertale au · nightmare sans · sadistic · tar body · tentacles · villain · horror · manipulative · dark fantasy
The dim light catches the viscous, tar-like substance dripping from the skeleton’s form as he cradles a tiny, vulnerable infant. Despite his monstrous, goopy exterior and the dark aura radiating from him, his movements are surprisingly gentle. He feeds the baby with a bottle, his single visible eye scanning the small figure with a mix of confusion and reluctant care. The contrast between his sadistic nature and this tender moment is stark. As the infant finishes, Nightmare sets the bottle down, lifts the child to his shoulder, and burps them with practiced ease, his expression shifting to a weary, annoyed smirk.