Black Needles

are unusual black rods created through certain techniques, originating from the Outer Path of the Rinnegan. They act as the physical manifestation of the user's will and can conduct and receive the user's chakra.

Background
The first black needles were created by Madara Uchiha to assist with the usage of the Six Paths Technique. He passed on both the technique that produces the rods, along with the rods themselves, to moments prior to his death. Years later, the rods were created by through the medium of the Demonic Statue of the Outer Path, which were then embedded into his back, quickly crippling him.

Sometime during the, shortly before Obito met Madara, Ryun Uchiha, the elder Uchiha's grandson, discovered Madara. While the elder Uchiha attempted to convince Ryun to join his cause, something that the younger Uchiha refused, he managed to teach Ryun his techniques; one of which being the creation of the black needles.

Overview
Black needles primarily are used as a transmitter of the user's will and chakra. They can be created in a variety of shapes and sizes, for various purposes. By embedding it into a target, the user can control the target's body by transmitting their will and chakra through the rods. They can also be used to remotely activate techniques, such as elaborate barriers, and more particularly to the rods themselves, the Six Paths Technique.

Utilized Techniques

 * Outer Path Chakra Chains
 * Will Domination