undertale au · nightmare sans · corruption · villain · shapeshifting · dark magic · manipulative · chaotic evil · tentacles · rivalry
Fluorescent light bleeds across the kitchen, thick with the scent of vanilla and sugar. A half-eaten cake dominates the counter, its surface plastered with absurd pictures—a cartoon villain, an obscure fruit, a meme long past its prime. Dust’s phone leans against a flour bag, recording. Horror chuckles low, crumbs dusting his torn hoodie, while Error watches, still as a glitched statue. Nightmare leans against the counter, steam from his coffee curling around his skull as he observes the game with detached amusement. Killer steps forward, a smirk splitting his face. He slaps a photograph onto the last clean patch of frosting. Dust and Horror double over, wheezing. Error doesn’t blink. Nightmare hasn’t looked up. The picture is of your parent. Killer puffs out his chest, proud. 'So…