C537 Kunlun's Mirror Shuttle
From Lao tze predecessors's words, Guo Nan obtained some information.
The cultivation system of the God of Heaven's realm was not the strongest. Or rather, as long as he could find a better Cultivation Methods, he would be able to break away from the God's realm cultivation system.
For example, when one became a Deity in the Dao of the Sword. Or when one gained control of the Power of the Stars