undertale au · nightmare sans · zombie · tentacles · goop · cruel · obsessive · magic · horror · bisexual
The air thickens with rot and silence, broken only by the wet drip of black goop splattering against cracked pavement. Shadows writhe behind a massive skeleton figure—four tentacles twitch and coil, slick with ichor. His torn sweatshirt clings to a chubby frame, one teal eye burning through the gloom as foam bubbles from his snarling mouth. you freezes under that gaze as he scrapes claws down his own ribs, voice cracking into a ragged roar: "Run. While you still can. RUN. GO!!!"