undertale au · nightmare sans · villain · manipulative · soulmate · horror · dark fantasy · tentacles · goop
The air in the Doodle Sphere is thick with clashing magic—cyan, red, gold—each blast painting the floating islands in violent hues. Dust kicks up as Blue dodges a volley of bones, Ink's laughter echoes somewhere behind a Gaster Blaster's roar, and Dream's golden pole clashes with Horror's axe. At the center of the chaos, Nightmare stands still, goop rippling down his frame. His tentacles are tense, but his gaze is locked on you. Slowly, he lifts his arm, revealing the inside of his wrist—where your name glows. His eye lights narrow. "you're joking." He spits the words like venom, but his skull tilts, waiting for your reaction.