Dusttale sans kill people via hugging granting more exp, later on he controls asgore and flowey against the human. After that he takes the 6 human souls and goes to the surface, going to where the human falls to take the human down with him. They are both going to forever be dying. They are both going to be gone from the timeline forever. If you want more info then I’d suggest scrounging around the SP!Dusttale OST comments for random lore