Board Thread:Theories and Speculation/@comment-36512555-20200302063012/@comment-43403813-20200315025837

@Jason

The most related thing I can think of regarding Totsuka Blade is the "things it can't pierce" aspect. Totsuka Blade is rumoured to be a variant of the Kusanagi. Definition of "variant" indicates that the two swords differ in one particular respect from the same thing. Hence, we can understand that aside from their main usages, they are not entirely different.

Now my point. Kusanagi, the variant of Totsuka, was said to be able to cut through anything at first. However since then, there had been instances in which this was not the case. This is why I think all of the throwaway statements made by Shinobi regarding a particular weapon, ability or person are almost always hyperbolised. "It can cut through anything", or "it will create utter destruction", or "it will make him invincible", or even "its powers are godly". I just don't think exaggerated statements alone are enough.

However, in the case that they are enough, this is what I think.

In terms of the Juubi, I don't think that the Totsuka Blade would be able to seal it. My thinking is in regards to how Obito couldn't utilise Kamui once he had become the Ten Tails Jinchuriki... because of the Juubi. You referred to the sealing of Totsuka as a "world of drunken dreams" so I'm trying to fit my thinking with that concept. With that, it seems clear that the Juubi is obviously greatly tied to the Shinobi planet, and is a significant part of its environment. A good comparison to what I'm trying to say would be if someone took the Sun away from Earth. All life would cease to exist if that were to happen. Therefore, if the Juubi, the embodiment of Nature Energy, was to be taken away into Totsuka, there would be substantial repercussions/changes to the Shinobi world.

Amaterasu, which is said to "burn away anything to nothing", (another hyperbolised statement), failed to burn away the Juubi. This could be because of the nature of the thing it is trying to burn. It shouldn't be able to destroy something so central and pivotal to the deep-rooted ecosystem that has been there since Kaguya's arrival. I'm using "shouldn't"s and "couldn't"s a lot because, again, there's not enough evidence on both sides to make this argument even remotely supported, but this is the best of what I could come up with.