He can do lots of powerful moves and he can fly at hight speeds fomr 1000mph-3000mph, so he's very fast. He cannot take off the cursed callar because it is permanent and he can't do anything to stop his transformation at all. The merchant wanted to sell him the cursed callar so that he could destroy Goku and friends.
So far he has almost killed everyone due to his actions.
Super Hot Kai Blast
Kai Punch(Super powerful)
Dustructo Disic 2(Really strong)
FYI: I made this so do not edit the picture unless I say you can!!!!