Board Thread:Versus Debates/@comment-31338621-20200309130706/@comment-31338621-20200326195517

@Ninja

Are you referring to when Naruto tried to rasengan Tobi through the back and Tobi phased through him. Tobi saw him then and commented on the clone. The intangibility relies on Tobi being aware of the attack, something he's completely unaware of should hit him.

Sometimes he should use it, when he has the advantage. Alternatively Itachi could avoid his katon, or use ribcage Susanoo to block his katon.