Cultivation of Immortality Begins with Savages

In the blink of an eye, time and space are chaotic. I woke up and opened my eyes and the sky fell! I turned out to be a girl even though I was a boy! I even brought up a smaller baby for no apparent reason! In order to survive in this primitive society, I can only continue to make myself stronger, and the only way to become stronger is to become an immortal...