Nisemonogan

Nisemonogan(偽の目, Nisemonogan) is an artificial eye that was made by Kenpachi Hyuga. It was originally a eye that was suppose surpass all other due to the amount of information possessed by Kenpachi, though it was failure due to the amount of time consumption and lack of samples.

Overview
Due to the fact the Rinnegan bring fear to people when saw, Kenpachi made the Nisemonogan have bears a striking resemblance to Madara's Rinnegan. Unlike the Rinnegan and more like the sharingan the user can close the Nisemonogan when necessary and it also posses stages. Though not sure how powerful the doujutsu is, Kenpachi believes that is has the power to be in the most powerful doujutsu list. Kenpachi was able to recover information about the Rinnegan during the battle of Naruto vs Pain, Obito vs shinobi, Madara vs Naruto and Sasuke and Sasuke and Naruto vs Kaguya.

Abilities and Stages
The Nisemonogan is suppose to be an eye with no flaw, the perfect eye.