Rebirth of Time

Fang Sizhu transmigrates into a cultivation world, becoming an ordinary disciple of the Qingyun Sect with mediocre talent. When he is bullied to the brink of death, he awakens the Eye of Time, fused with a fragment of the ancient Time Source Crystal, granting him the ability to observe and manipulate timelines. With the Eye of Time's many powers, he rises from the Qi Refining stage to the Eternal Realm, uncovering the truth that the world is cleansed every ten thousand years by higher-dimensional cleaners. He discovers he is the reincarnation of the previous era's Heavenly Dao Executor. Ultimately, he unites various forces against the Void Invasion, defeats the Void Lord who seeks eternal stillness, and sacrifices himself to attain eternity, establishing new rules for the era, allowing time to flow, reincarnation to continue, and granting living beings more choices. — Description from novelcodex.org