Board Thread:Theories and Speculation/@comment-26636534-20150710195521/@comment-5936871-20150713154125

GreatestSin wrote: Thekillman wrote: His chakra pool isn't small by any measure. Hell, Pain said that he and Kisame had the most chakra among the (then known) Akatsuki members. than that means that he will get PS which will wipe the floor with every bijuu or gaint avatar, even kaguyas black-ball-bomb would be reflected ^_^ The Yata Mirror only defends from one direction, and it's a featless shield anyway. It is said to be endowed with all nature transformations and able to change its characteristics to any nature transformation to completely negate any attack, whether it be spiritual, or physical.

It's basically talking about using the basic nature transformations to counter and negate ninjutsu attacks, which makes it "invincible" because most people only use elemental ninjutsu. It's ridiculous to believe that it is literally invincible and can deflect every single attack in existence, especially one from Kaguya.

If that was the case, Itachi wouldn't have to do shit against Kabuto and could stand there with his Susanoo active wielding his Yata Mirror and do nothing and tank all of his attacks. Which he didn't do, and Kabuto had attacks that could bypass Susanoo's defence, so if the Susanoo itself is damaged or unable to be maintained, the mirror will vanish too since it's apart of it.

As for the Sword of Totsuka, it's main power lies in it's ability to pierce people. The only two people who have been hit by it, is a gigantic weakened Orochimaru who was an easy target, and a nearly immobile Nagato. So clearly there is probably a lot of people who could either dodge it or defend against it somehow. Honestly, the Sword of Totsuka and Yata Mirror making Itachi "nearly invincible" thing was just overhype at the time.