[ His abilities are; AU Hopping: Nightmare has the ability to hop through AU's at will. | Appendages: Nightmare can utilize four tendrils that burst out from his back in battle. He can stab, grab, or swat at a foe with them. He can also trap one within an appendage. Most of the time Nightmare can't control them. | Negativity: He feeds upon negativity to empower himself. He can also utilize negativity in a variety of different ways, though he mainly uses it as a source of energy and a weapon. | Goop: The dripping darkness Nightmare's frame consists of grants him immunity to all types of weapons and magic. If stabbed, said weapon would be caught and melt within his goop. Magic attacks might split his frame in half, but he can always reconstruct himself. Most of the time he'll just use his appendages to block or absorb the magic used to attack him. | Shapeshifting: Nightmare can take the form of anything he wants, but keeps to his Sans form because he is comfortable with it. ]

Description: -Terrie | Redrew [The gaster blaster]: https://www.pixilart.com/art/youre-in-for-a-bad-time-now-f03abb81423a887