Board Thread:Versus Debates/@comment-29769110-20161225192847/@comment-25122992-20161225201534

Technically, still not Itachi's ability, especially since he gave it to his crow. Also, during the series, this crow either couldn't use Koto due to the 10-year cooldown, or was stored within Naruto set to react only on Itachi's MS, or already destroyed by Amaterasu of Itachi himself. So it's not an ability Itachi can casually use in battle, rather he can't use it at all. Moreover, the use of Koto in 1 on 1 battle renders the fight itself meaningless, due to the Koto user being able to instantly end it.