The End of the World Is Coming: I Will Clear Out a City First

The end of the world + supernatural power + no holy mother + no wisdom + no hydrology + no immortality Han Bing encountered a system possession at a low point in his life. He learned that a natural disaster was coming and that various powerful enemies were coming one after another. Fight both with force and intelligence, level up and fight monsters, hone yourself, and gain your own happy life I already have a system, how can I still not protect the people around me?