C672 Breakthrough

Su Xiao could feel the surging spirit energy in his body, causing the previously unattainable barrier to be clearly seen. Originally, Su Xiao could use 300 million Knowledge points to break through to the Venerable realm.

But during this period of time, Su Xiao, who seemed to have gained some insight, also wanted to try and see if he could break through by himself, and not by relying on Systems