Rinne Sharingan

The is the progenitor of the Rinnegan and Sharingan. It is characterised by a ripple-like pattern which spreads over the eyeball, with red sclerae and irides, containing nine tomoe.

Background
This dōjutsu was first manifested by Kaguya Ōtsutsuki after eating the Shinju's fruit, and later by the Ten-Tails, the combined entity of Kaguya and the Shinju. Madara Uchiha, after retrieving both of his own Rinnegan and approaching the moon, awakened this dojutsu in his forehead, allowing him to cast the Infinite Tsukuyomi. As a result of Black Zetsu's actions, Madara's body then served as a vessel for the resurrected Kaguya, who retained the Rinne Sharingan in her own third eye.

Abilities
Kaguya can teleport herself and others to a series of alternate dimensions. The Rinne Sharingan is also able to cast the Infinite Tsukuyomi, a powerful genjutsu which Sasuke can counter with his Rinnegan. The Rinne Sharingan possesses the ocular power and techniques of the Sharingan, as stated by Hagoromo.

Trivia

 * The kanji is also used in Rinnegan and Sharingan, potentially linking the three terms etymologically.
 * The Infinite Tsukuyomi, despite only being casted by the Rinne Sharingan, has been referred to by Sasuke as genjutsu of the Rinnegan. However, the distinction between the Rinnegan and Rinne Sharingan was made clear in the Fourth Databook.