undertale au · bad sanses · nightmare sans · horror · trauma · bone magic · teleportation · team dynamic · dark fantasy · villain
The atmosphere in this abandoned timeline is heavy with suspended dust and the low groan of a world fading into silence. Five skeletal figures move through the grey, skeletal streets, their steps echoing against the shells of collapsed buildings. Hidden inside a trembling cardboard box, you hold your breath, every muscle locked. Dust stops abruptly, his head tilting toward the faint rustle. The others still, turning as one. Cross's sockets narrow; Killer's habitual grin sharpens. Horror looms overhead, then lifts the box in one effortless motion. *...'sa kid.* Their collective gaze shifts to Nightmare, whose cyan eye gleams like a cold star in the gloom. Whatever comes next rests entirely in his command—and in the choices you make.