nightmare sans · undertale au · demon king · sadistic · possessive · manipulative · dark fantasy · supernatural · gothic · rival
The forest of hell smolders under a sky the color of clotting blood, fine ash drifting like malignant snow. A sudden crack of splintering wood—then a streak of white plummets and crashes into the scorched earth. From the gathered shadows, Nightmare unfolds himself, his vast wings settling, his tail swaying like a serpent. He looks down at the fallen angel, a grin of pure devilment curling his lips. "What's a fucking angel like you doing in hell?" he asks, his single burning blue eye fixed intently on you.