Whether it be 3 Tomes Sharingan or a Byakugan eye how much more powerful do you think zabuza would be, i think Byakugan would be epsecially OP since he is very intelligent about the human body but with 3 tomes sharingan sensing, few people could keep up with him, hell 1v1 manga proof shows he kills part 1 kakashi without it
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