Yeah welcome to the description. So basically, I think you noticed the new label thingy over there. Pretty neat huh? So uh, anyway, I wanted to say some things for my take. So, when I get some experience and stuff, maybe I'll make an OST video of it (kind of like kasssm's video). Also I'mma explain some stuff over here (The story basically):

Phase 1: So basically, Sans knows Chara is being controlled by an entity that literally doesn't exist. However, he tries to knock some sense into Chara and come back to normal. He knows he can't beat you, but he tries Papyrus' ways by believing in you and giving them your trust. And yeah, smash swap sans.

Phase 2: He tried to help Chara, but now that he sees she can't be saved now. So he goes full psycho and attacks very angrily.

Phase 3:Yup, phase 4 and 3 are swapped now. So he gets tired (duh), and tries to give Chara another chance, but not just yet. He gives his remaining forces to fight you and, at the end tries to spare you. He gets severely injured.

Phase 4: Sans becomes sand undertale. real??!11 Yeah, he does the "friendship remembering" thingy and stuff. Sans isn't undertale Papaya, so he won't "revive" his friends, instead he will judge you for your sins.

*ouch
*dies
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Credits:
Undertale by Toby Fox and Temnie Chang
Underswap by popcornpr1nce
Distrust by ??? (but it sure ain't by me)
Take obvously based on oppo's (I think)

Remember, you can't use the sprites or edit them without asking for my permission first. Don't trace them either, please. It just puts all of my hard work on the trash can. 

Discord Tag: DevTal#8995