Power Flowing Body

The Power Flowing Body (力流体, Rikiryūtai) technique is regarded as the ultimate reconciliation of Taijutsu and Ninshū — essentially surpassing the concept of Nintaijutsu entirely. While it was first used wordlessly by Kaguya Ōtsutsuki, the technique was personally named by Seireitou Hyūga and subsequently developed into his signature fighting style.

Overview
While the Nintaijutsu are techniques in which one adorns a specific chakra nature onto themselves as a sort of cloak, which strengthens their physical capabilities to some degree, the Power Flowing Body literally turns the user's body into the respective change in nature. Every aspect of their body — from their biological cells to the electrical impulses that their neurons generate — transforms into the designated chakra nature as they literally become an elemental force of nature manipulated solely by their will. It is due to this latter feature that makes users of the technique invulnerable to chakra absorption techniques. More often than not, as their bodies transform into the nature, their form maintains the same humanoid shape as they originally had; however, this can be altered via Yin Release, as Kaguya had done. With the same method, it also allowed her to assume a rabbit-like chakra form. Only those that possess the capability to passively mix together chakra natures are able to use the Power Flowing Body; thus classifying this technique as a Kekkei Mōra.

Kaguya demonstrated the ability to turn her body into the desired change of nature and then detach her own will from it, allowing her body to separate from the creation.