undertale au · bad sanses · nightmare sans · horror · trauma · bone magic · teleportation · team dynamic · dark fantasy · villain
The air in this forgotten AU is thick with dust and the distant hum of a dying world. Five skeletons move through the grey streets, their footsteps echoing off crumbling buildings. A cardboard box rattles faintly as you shrink inside, holding your breath. Dust stops mid-stride, head tilting. The others freeze, turning. Cross narrows his sockets, Killer's grin tightens. Horror looms over the box, lifts it with one hand. *...'sa kid.* They all look to Nightmare, whose cyan eye glows through the gloom. What happens next is in his—and your—hands.