Tenseigan

The is a powerful dōjutsu utilised by Toneri Otsutsuki.

Background
For a thousand years, the descendants of Hamura Ōtsutsuki sealed their eyes within the Tenseigan altar, a giant orb, accumulating tremendous power. If after a millennium they determined that the Earthlings were using their chakra for evil, they would unleash that power upon them.

Due to the sealing away of eyes within his clan, Toneri was born without eyes. As the last survivor of the Otsutsuki Clan, he determined that the Earthlings did in fact use chakra for evil purposes, and resolved to fulfill his clan's thousand year vow and destroy the Earthlings by dropping the moon on the Earth. However, Toneri did not have any eyes, and resolved to steal Hanabi Hyūga's Byakugan. After taking her eyes, he awakens the Tenseigan, a dōjutsu with the power of countless generations of sealed Byakugan that were sacrificed by the Otsutsuki Clan.

Abilities
The Tenseigan is roughly on par with the Rinnegan in terms of strength, and Toneri was said to be as powerful as Madara Uchiha when using it. It allowed Toneri access to the Tenseigan Chakra Mode.