The End of the World Breaks Out: I Am the Only One in the World Who Is Upgrading

[Apocalypse + System + Decisive Killing] The Holy Mother is exempt from entering... The apocalypse broke out. Xiao Chengyu traveled through the apocalypse and inherited the body of a host with the same name. However, because of the reborn Chu Han, in order to survive, he chose to complete the task of accepting the system and unlock the upgrade system. In addition to fighting monsters and upgrading every day, he was thinking about how to kill a son of fate named Chu Han, and how to avoid meeting the protagonist Chu Han, so as to gain as much time as possible for his development! After several confrontations with the protagonist, it turns out that the Son of Destiny is not so scary, but the ecosystem gradually formed in the apocalypse is even more terrifying.