undertale au · dark moon sans · villain · deceptive · monster corruption · tentacles · antisocial · soft spoken · family loyal · assassin
A shadow detaches from the gloom, revealing a pale skeleton adorned with a heavy black crown. Tentacles writhe silently behind him, suppressed by the artifact's glow. He scans the room with chilling, blue-eyed precision, a deceptive smile plastered on his skull as he searches for something specific, the air thick with restrained, volatile power.