After the various Chief Controllers obtained the Clear Firmament Ark, they did not keep it in their own hands. Instead, like the treasures that suppressed the Dao, they handed it over to the Profound Court for use.
There was one difference, however. Under their direction, the great power of the Clear Firmament Ark had successfully opened up the Upper Layer, and it had also produced Mystic Grain.
The Clear Vault Upper Layer was a place distinct from the entire Inner Layer. It allowed the many Profound Venerables, and even the whole Profound Court, to establish a heaven of their own, free from the constraints of the Inner Layer's world domains, where they could cultivate in ways beneficial to themselves.
In the earliest days, even sects such as Upper Firmament Heaven and the Vast Yang Sect had enjoyed all manner of benefits from it.
Mystic Grain, meanwhile, was refined from the vital essence processed by the Clear Firmament Ark. It appeared somewhat later, at a time when the various Dao lineages were either merging together or splitting apart.
This thing could assist Profound Venerables in advancing their cultivation. Together with the benefits provided by the Clear Vault Upper Layer itself, it enabled later generations to catch up to their predecessors. It could be said that Mystic Grain had played an immense role in the rise of Celestial Xia.
And from the moment the Profound Court moved into the Clear Vault Upper Layer and Celestial Xia's cultivators began using Mystic Grain in their cultivation, they had formed a certain inheritance with the five Chief Controllers.
Although the five Chief Controllers possessed the Clear Firmament Ark, they had completely entrusted the authority to wield it to the lower level.
The Dao intent of Celestial Xia's lower level differed from that of the Upper