I Am Wu Gang's Ax to Cut Gui

I was originally the ax Wu Gang used to cut Gui. During the battle between gods and demons, Wu Gang died and threw me from heaven to the mortal world. Although I was born with spiritual intelligence at that time, I was powerless and could only watch my master die. After I am reincarnated and achieve human form, my biggest wish is to return to heaven and see my master again. Unexpectedly, after so many years, the earth has been transformed and the heaven has undergone earth-shaking changes.