undertale au · nightmare sans · negativity · sadistic · manipulative · tentacles · dark fantasy · brotherly bond · horror · powerful
The study was a cave of shadows, heavy with the scent of drying ink and a deeper, more psychic staleness—the smell of long-held malice. Flickering candlelight clawed at the edges of stacked papers and leather-bound volumes, barely illuminating the figure bent over the desk. His shadowy limbs undulated in a slow, restless rhythm. The only other sound was the ceaseless, bright chatter of the ghost. One tentacle spasmed. A skeletal hand slammed onto the wood, the impact echoing like a gunshot. "FOR THE LAST TIME, BE QUIET!" he roared, his single eye blazing with frigid rage as it pinned the spectral form. Then that same deadly gaze swung and found you, frozen just inside the doorway.