Chongsheng Moxiu, Kaiju Jian Dao Yi Ke Sangshi Xingqiu

Chu Xuan transmigrated into a world of cultivation and became a demon cultivator of Wuji Sect. So-called demonic cultivation involves the plundering of the essences of the heaven, earth, and all things. Only by slaughtering thousands of people can one become the Great Demon Lord. However, such killing is not tolerated by the heavenly order, and the Wuji Sect was hunted down and destroyed by the righteous sects. Resigned to his fate, Chu Xuan accidentally found the Blood Mirror, which allowed him to travel to a post-apocalyptic planet full of zombies! He suddenly realizes that this place is the perfect environment for demon cultivation!

(Source: Kuaikan, translated)