Pang Jian had always known that his sister, Pang Lin's ultimate goal in her fierce quest for the Great Tao was the Old Thunder Dragon slumbering in the Dragon Cave.
As long as the Dragon Cave exists and the Old Thunder Dragon lives, Pang Lin will never be able to ascend to the status of a True God.
It was much like how the aging Rock Bear, before the death of the tenth-level Mysterious Turtle was confirmed, had no hope of challenging the Demon God in his entire life.
Before he set foot in the Saint Spirit Continent, he did not know what the Dragon Cave meant to the Demon Race, nor did he understand the deterrent power of the Thunder Dragon that had dominated the Thunder Tao for ten thousand years.
He originally thought that a True God would be enough to suppress the Thunder Dragon and that the Thunder Dragon would fear the human forces guarded by a True God.
After all, the Saint Spirit Continent is located in the Second Realm, not at the summit of Purgatory in the First Realm.