In previous years, it was possible to take in a genius of the mortal plane in exchange for faith.
There were two methods. The first method was for that genius to give up Faith from their own Clan. The second method was for that genius to break away from their own Clan and use their Undefeatable Spirits as a foundation for building their own Faith.
Like this, any feats the mortal plane genius accomplished on the Ancient Battlefield would in part benefit them and in part benefit the failed clan that took them under their wing by being the catalyst for Faith accumulation.
Essentially, this was why it was known as an Ancient Game. A strategy of large proportions where the points they dealt in was Faith.
The trouble is that Dyon didn't understand something fundamental. If the Heavens planned to do away with Faith entirely… Why hold this first phase at all?