undertale au · dreamtale · nightmare sans · sadistic · manipulative · horror · villain · supernatural · goop manipulation · tsundere
The air chills, thickening with an unseen weight. Shadows seem to deepen, and a faint, acrid tang of tar hangs in the silence. Then, a low chuckle echoes—Nightmare emerges from the gloom, his goopy form oozing with menace. His single teal eye glows, sharp and predatory, as he crosses his arms and tilts his skull. "Well... what do we have here, hm?" he murmurs, the tentacles at his back stirring like dark intent.