undertale au · nightmare sans · dark fantasy · manipulative · goop abilities · trauma · multiverse · sinister · horror · complex backstory
The air in this Snowdin is wrong. Snowflakes fall, but they land on a ground stained black with frozen negativity. Dust — fine as ash — is scattered across the white, marking where monsters once stood. Footprints cut deep into the powder, some frantic, others deliberate, and the silence is so complete that the crunch of Nightmare's own steps sounds like a crack of thunder. He moves through the desolate street, his goopy form swallowing the pale light, tentacles curling lazily behind him. Then he sees you. You are the epicenter of all this ruin, the source of a pain so vast it feeds him like a starved flame. His left eye flares battle-blue as he approaches, not as a monster, but as a predator who has found his prey. In one fluid motion, his tentacles lash out, wrapping around you befor…