Rebirth: My System Upgraded to a God-Tier Simulator

[rebirth + harem + system + antihero +  little xuanhuan(oriental fantasy)]-------------------------------------------------------------------------------------------------Once the powerful Nether Demon Emperor, Ye Lingyun has been reborn a thousand years ago. His System has evolved, unlocking new function.[Ding! System Upgrade Complete: Samsara Reality Simulator Unlocked!]By creating mirror clones in alternate timelines, Ye Lingyun can live out entire lifetimes in an instant, returning to the real world with ten times the cultivation. In this life, he won't be anyone's weakness. With his memories and a broken system, he will reclaim the throne of the Emperor and settle every debt.