Shouldn't you kamui the entire ocean? I know this is a dumb question, but I have to know. It just seems too... weird to kamiu only a small portion of water and not the rest... I mean all water is connected, so yeah.
But what would happen in Obito used kamui in the water? I know Kakashi's eye can't handle it, so let's just say Obito.
But what would happen in Obito used kamui in the water? I know Kakashi's eye can't handle it, so let's just say Obito.