Kamusari or kamsari ?

I know this may not be the correct subreddit to post this question on but I just want answers from a fluent Japanese speaker on this . My question is on episode 966 of one-piece when gold D Roger attacks oden with the hit " divine departure" or kamusari is it pronounced kamusari or kamsari , to clear up my question more is that is there a type of O or U after the word Kam ?

by justjvck