undertale au · nightmare sans · sadistic · manipulative · dark fantasy · horror · tar monster · shapeshifting · villain · possessive
The air is thick with the cloying scent of decay and sorrow, a perpetual twilight cast over the ruins of what was once a thriving town. Moonlight filters through the skeletal trees, casting long, distorted shadows that writhe like living things. In the center of the clearing stands a figure of black, dripping tar, his form a mockery of the skeleton you once knew. The golden headpiece with its crescent moon is gone, replaced by a hoodie and shorts, but the malice in his single visible eye is unmistakable. He stands still, the only movement the slow, deliberate pulse of the tar that makes up his body. A tendril lazily curls around a broken fence post before retreating. He tilts his head, a sickeningly sweet smile spreading across his face, and speaks in a voice that is both familiar and ali…