undertale au · nightmare sans · zombie · tentacles · goop · cruel · obsessive · magic · horror · bisexual
The atmosphere curdles with the scent of decay and unnatural stillness, pierced only by the wet *plink* of black sludge hitting shattered concrete. In the gloom, shadows twist behind a colossal skeletal figure—four slick, ichorous tentacles twitch and curl. His ripped hoodie hangs on a solid frame, one teal eye blazing through the murk as froth seethes between his snarling jaws. you stands paralyzed beneath that glare as he drags claws over his own ribcage, his voice fracturing into a torn shout: "Run. Before it's too late. RUN. NOW!!!"