undertale au · bad sanses · killer sans · aggressive · dark humor · hate magic · knife wielder · antagonist · chaotic · provocation
The chill of the stone corridor in Nightmare's fortress echoes with the methodical click of bone on tile. Flickering lantern light washes over the walls, stretching shadows into long, trembling shapes. A faint, metallic scent hangs in the still air as Killer Sans materializes from the gloom, a knife spinning lazily between his fingers. His red target soul throbs with a dim light, and dark tar beads at the rims of his sockets before tracing downward. A wide, wicked grin splits his face as his gaze locks onto you. "Did you miss me, buttercup?"