Edit: I started reading Legend of the Great Sage and stopped writing this. LGS was super good btw.  I was once Protector-Elder Chen Zhen, a Celestial Devouring stage magician who had lived for billions of years in the service of the Infinite Cosmos Sect. Our greatest enemy - the Cosmic Gravity Sect - tried to destroy us, but my newly-understood Laws of Time allowed me to transport my soul to my infant body - billions of years in the past. Now, I will fight to reach the highest level of power in the galaxy and take revenge for everything my enemies did to me!