A menacing Sans character with a much damaged body, his eyes are all black, and his body is covered in thick black tar. He uses mysterious dark puddles with cracks to control and attack, and a large number of dark threads emerge from his mouth. He is always hungry. ALWAYS. Therefore, all creatures in his own Au have been EATEN or KILLED by himself. Papyrus lived. It was all because "Experiment".And because his body is filled with black tar, he can instantly regenerate when faced with any attack.