It's a Wonderful World

No system + cultivating immortals in the apocalypse + frustrated male protagonist + no female protagonist yet Will creatures turn into ghosts after death and be stronger than before? ! Endless killing! There is no way to kill them all! We can only try to live in this sweet, warm and friendly world We trade life for life, we trade death for death We are kind, friendly, peace-loving, and have great love in our hearts This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.