Board Thread:Versus Debates/@comment-26636534-20180205153025/@comment-4080775-20180225101443

He can make however much time he wants pass, but he can't kill with it, as Kishimoto stated himself that Genjutsu can't kill by itself. Should Itachi use it even once, his vision will be blurry as shown and stated on the Tsukuyomi page. He'll need more than Genjutsu to win this battle.