Board Thread:Naruto Discussions/@comment-36006024-20180926134241/@comment-33485854-20181001161734

@Legion. I did not give you one because your response irritated me, I apologize. The fact Madara states that Shinobi ironically returned to the method in which Kaguya manipulated Chakra tells the method which she uses is not the only way. We also know she received Chakra directly from the Chakra Fruit. How could the Chakra Fruit giver her a infusion of energies it itself does not have.

You can argue that absorbed the blood of the dead but that doesn't work. The Physical Energy used to empower Chakra requires the energy of the living cells of the body, not the dead Cells in blood. If anything, the Tree is a conduit of Nature's power.

With that, we know of Ninjutsu, Senjutsu, and Ninshu. Three different methods of manipulating Chakra.

Ninshu: Manipulating Chakra purely with Mental Energy

Ninjutsu: Amplifying Chakra by liking Mental and Physical Energy

Senjutsu: Amplifying Ninjutsu Chakra by linking it with Natural Energy.

If Mental Energy is a requirement for manipulating Chakra, all that is left is empowering Chakra by Linking Mental Energy and Natural Energy. That could be the Ten-Tails power.