Return of the Immortal Realm: All Rely on Mutation to Enhance Strength?

[Kill decisively][No Virgin][Single female protagonist][Not cliched and bloody][Kill by blocking the door] After three thousand years of blood and tears, Yang Xiu returned to Earth, only to find that the Earth was shrouded in a strange fog. So, while recovering his strength, he explored the secret of the mist. At the same time, he accepted a disciple and became a master. Because he had endured hardships, he began to tear up his umbrella and become a non-human being.