Shadow/ Dark Remake

Description: Dragon isn't mine, not sure who's it is. Shadow Sans was from a pacifist timeline, until he got cursed by a dragorian named Demon. He turned into a shadow monster and killed everyone in the underground because of his killer instinct. After killing everyone, he left his Au and went into Dreamtale, where Dream and the dragorian Angel found him. Because of his killer instinct, he tried to kill them both, but Angel was able to temporarily disable his killer instinct until he was able to control it. When she did this, she also took away Shadow's memories of his past, so he can't remember his Au or meeting Angel. However, Shadow occasionally has nightmares of his past, but doesn't know anything or anyone in his nightmare except himself. Shadow mostly likes to hang out with the other Sanses. He also likes hanging out with the Papyruses, but he doesn't seem to know or remember why. He is pretty nice and chill, despite his killer instinct. However, meeting new people makes him very nervous, but he doesn't know why. Every now and then, his tail or spines will come out and the other Sanses will have to tell him. His killer instinct is very hard to control and seeing large amounts of blood, or tasting it, will trigger his killer instinct making it almost impossible to control. When this happens, he goes through a painful transformation into his shadow beast form, and will remain like that until he can calm down his killer instinct. Part of the curse is that he can't be killed in any physical way, unless he is burned to death. Some magic has no effect on him, and destroying his soul doesn't kill him but will make him souless for a while, making it harder to control his killer instinct. Along with his magic, he can become a shadow and hide in the shadows of others. When he does this, he cannot be touched unless your shadow comes in contact with him. He can still interact with the world around him.