*Gaster didn't do anything to Sans. He just whispered to Sans, who had gone crazy, that he didn't have to endure it anymore.* *His madness is entirely his.* (This is not a stack AU. He is neither Insanity nor Dust. Just a Psychopathy Sans.)
Welp another one in MTT. If there's another version of MTT but different members, it will be: Slaughter (another Dust!Sans) Yandere!Sans (looks like Killer but he's gone crazy for the Human) Undertomb!Sans (I can't think of another one who will have Horror's place) Psychopathy!Sans (looks like Insanity but still have some sort of consciousness)
Is kinda mixed by dust and insanity but different one or different AU instead. And completely crazy. More crazy then insanity. Crazy sans been now born.