It was very hard for low-end existential planes like Heaven's Vault Continent, where resources were sparse, and laws of nature were indistinct, to possess any kind of astounding secrets most of the time. At best, one might find things like half-deity ruins and so on, but that was about it.
However, even these were of absolutely no value to the high and mighty deities, let alone having a secret that could astound a higher deity. The only thing that Meng Lei could think of was the Tower of Time.
Not only was the God of Time a Great Perfection deity that had comprehended and perfectly assimilated five types of basic laws, but he was even an Ancient God that had comprehended time-based laws of nature.
Despite not in possession of Chief God divine cores, Ancient Gods could nevertheless contend against Chief Gods. What kind of powerful existence must they be, then? And how great and noble must they be?