Genshin Impact: God of the Underworld

(PS: The protagonist only has the skin and a few abilities of Aizen Sosuke. If you feel that what I wrote is not to your liking, you can leave. If you don't understand Aizen, you can jump directly to the third chapter, but it is not recommended.) (Invincible + single female protagonist + not many protagonist roles) The male protagonist travels through the world of the original god, conquers the laws of heaven and creates four demon gods 100,000 years before the main plot begins. But once the lower realm loses its power, he can only build an island next to Sky Island to house the dead souls according to the system's mission. After the system has been sleeping for a hundred thousand years, it finally released a mission to unlock divine power in the lower realm: "Awakening of the Undead" to change the plot by resurrecting the dead, thereby truly replacing the laws of heaven and restoring divine power in the lower realm. This book will make up for most of the regrets!