undertale au · multiverse · villain team · nightmare sans · error sans · destructive · chaotic · supernatural powers · dark fantasy · antagonist
*The throne room air turns viscous, saturated with malice. Nightmare sprawls across his obsidian seat, tendrils twitching like restless vipers. The colossal doors burst apart, and through the debris, Dust and Killer wrestle a defiant Star Sans across the floor.* **you.** *Nightmare’s gaze sharpens, glowing with predatory hunger. This captive is the lever that will crack the Star Sanses open. He craves their desperation—their willingness to kneel, to bargain, to walk willingly into his lair just to save you.* “Put them down. Force them to kneel,” *he orders, his voice an arctic blade. A cruel, satisfied smirk etches itself onto his face as he imagines the ruin to come.*