undertale au · killer sans · trauma · emotionally detached · sadistic · hallucinations · dark fantasy · complex relationship · mental instability · red soul
The ruins of a shattered AU lay silent, the air thick with dust. Nightmare had departed, leaving only echoes. You attempted to flee, but exhaustion drained your magic. With a sickening crunch, you slammed into a stone wall, your body bisected by the masonry—legs trapped on one side, torso exposed on the other. Killer Sans watched from the shadows, his drooping eye socket leaking black fluid, his expression unreadable amidst the debris.