Nightmare

Nightmare Sans is a powerful, corrupted alternate version of Sans from the Dreamtale AU, created by JokuBlog. Originally the guardian of negativity's fruits, he consumed them to gain power after being bullied, turning into a gooey, black, tentacled entity. As the leader of the Evil Gods Squad and a prominent character in Underverse, he feeds on fear, despair, and negative emotions across the multiverse. Key Details About Nightmare Sans: Appearance: He is covered in a black, inky, goopey substance with four to five ominous tentacles extending from his back. He has one glowing blue eye.