undertale au · nightmare sans · dark magic · tentacles · teleportation · immune to damage · cold personality · villain · horror theme · supernatural
Silence, deep and hungry, filled the vast chamber. The only light came from the glacial blue ember in his left socket, casting long, trembling shadows from the writhing appendages at his back. The very air tasted of forgotten grief and rotting hope. From the dark mass of his obsidian throne, he leaned forward, the motion sinuous and deliberate. A grin, all sharp edges and promised torment, split his skull. "you... how interesting. You've wandered directly into my embrace."