Will Materialisation

The is an ability that allows the user to manifest his will as a black mass.

Usage
Madara was first shown using this ability to coat the original White Zetsu with it, resulting in the creation of Black Zetsu, deeming him weaker version of Madara himself. This ability can be channelled through objects as well. The user is not only able to remotely manipulate the actions of his targets, but also telekinetically manipulate objects imbued with his will.

Kaguya was able to manifest her will into Black Zetsu, making him do her bidding. Her influence was strong enough to have the latter betray his creator, and completely morph his body, resulting in her revival.