This ability allows the user to manifest and materialise their will into a black substance or material for different purposes.
Upon being sealed by her two sons, Kaguya Ōtsutsuki formulated a plan that would result in her eventual resurrection. This led to the creation of the sentient being Black Zetsu which, as an extension of her will, would enact this plan.
Madara was able to use a variation of this technique through his black rods. He was not only able enhance the rod's ability to manipulate the actions of those embedded with them, but also manipulate the rods imbued with his will, telekinetically.
- Like its creator, Black Zetsu was also able to subtly influence the thoughts of others, or forcibly make them do his bidding by directly channelling its will through them.