Kodaibito no me

One of the Uchiha Artifacts that Engetsu Uchiha discovered when using the expansive information gathering network of The Forsaken. This strange obsidian pendant bears a Three-Tomoe Sharingan depicted in bloodstone upon its face yet the image itself is not the strange feature, it's uniqueness lies in the tales of the pendant having to accept it's bearer before it may be worn. Upon accepting it's bearer the depiction of the Sharingan shifts to match that of it's owner, upon activation of their Mangekyō Sharingan the pendant will morph to become a mirror-copy. This transformation was again seen when Engetsu awakened his Eternal Mangekyō Sharingan, the pendant now shifting to depict his EMS when he activates it. Currently Engetsu hasn't noticed any special effects beyond a decrease in the chakra required to maintain his Sharingan and activate it's abilities, although the intel he'd gathered suggests that it holds other, more powerful, abilities.