Sci-Fi Beyond the Reincarnation Cycle (Xenoblade Chronicles 3 Multi-Crossover Semi-SI-OC)

Striving for immortality, I've done the impossible and grown beyond the limitations of this world. In the space beyond this universe, there I found a system of reincarnation. Using its power, I awoke to a world from my memories and decided to revive its shattered splendor. After freeing it from its own oppressive nature, I continued my journey to other worlds in the reincarnation cycle.