Tenseigan

The is a powerful dōjutsu utilised by the Ōtsutsuki clan. It is characterised by a blue pupil surrounded by a blue and white flower-like iris.

Background
The Tenseigan was first manifested by Hamura Ōtsutsuki. Due to this, the combination of his two bloodlines, the Hyūga and the Ōtsutsuki clans, can evolve the Byakugan into the Tenseigan. This was proven a millennium after Hamura's time by one of his descendants, Toneri Ōtsutsuki, who awakened the Tenseigan by kidnapping Hanabi Hyūga and stealing her Byakugan; Toneri having to do this being born without eyes due to the sealing away of his clan's eyes within the energy vessel. As the last survivor of the Ōtsutsuki clan, Toneri concluded that mankind did in fact use chakra for evil purposes and he became determined to fulfil his clan's thousand year vow and destroy humanity by awakening the Tenseigan and dropping the moon on the Earth.

Abilities
The Tenseigan allows the user to control both attractive and repulsive forces, similiar to the Rinnegan. Additionally, it also grants the wielder Tenseigan Chakra Mode, which in turn gives the user an increase in speed, power, strength, durability, and reflexes. It also grants its user Truth-Seeking Balls, thus granting the user all five nature transformations and Yin–Yang Release.

Trivia

 * Similar to the process of awakening the Rinnegan by combining the chakras of two bloodlines of Hagoromo, the Tenseigan is awakened by combining chakras of the Ōtsutsuki, descended from Hamura, and the Hyūga. More specifically, just as the Rinnegan requires the chakra of Asura and Indra to awaken, the eyes of a Main Branch Hyūga and the chakra of an Ōtsutsuki descended from Hamura are needed for the Tenseigan.