The three thousand worlds are like a sea of sand, which is called the "earth world". Practitioners use spiritual dust as a guide to transcend the mortal body and pursue the "immortal true self". However, after the ancient war, the way of heaven was lacking, and the way to ascension was cut off. The end of the path of cultivation is the "tribulation of dust". The body and soul of those who have reached the peak of cultivation will turn into billions of spiritual dust and scatter to the heaven and earth. This is the tragedy of "falling dust".
