Reborn As A Demonic Cultivator, Picking Up A Zombie Planet At The Start summary:

Chu Xuan traveled through the Cangxuan world and became a demon cultivator of Wuji Sect. The so-called demon cultivation is to plunder the essence of heaven and earth and seize the essence of all things. After slaughtering thousands of people, he became the Great Demon Lord. However, killing is not tolerated by the heavenly way of the human race. Wuji Sect was also destroyed by the righteous sect. When he was helpless, Chu Xuan accidentally got the blood mirror, which could take him to a doomsday planet full of zombies! He suddenly discovered that this place is simply a paradise for demon cultivators!