Quanzhi fashi : Versatile Mage ; the God of Magic

Neo, our protagonist, reincarnated into the world of quanzhi fashi but the twist here is that Neo originally belonged to the world of Quanzhi fashi!! He has regressed into a past after the world ended but he doesn't recall his memories of the past life. Good thing is that he recieved blessing of some god that can help him in this life. He even carried some of his powers from the past. Though, those sinister abilities definitely made him the enemy of the world. Let's see if he survives or not? Whether his blessing is a blessing or a curse?