What is obito left eye?

Obito Uchiha's left eye is the Rinnegan, a powerful dōjutsu that grants its wielder extraordinary abilities, including the control over life and death, time-space manipulation, and the Six Paths Techniques. Initially, Obito's left eye was the Sharingan, which he later transformed into the Rinnegan after gaining the Sage of Six Paths' powers. This eye plays a crucial role in his plans during the "Naruto" series, especially in relation to the Infinite Tsukuyomi and the revival of the Ten Tails.