Baby Lex felt contemplative as he heard Cassandra' explanation. He had learnt a lot of new information that was more relevant to him than she knew, all in the hopes of explaining something that she never said explicitly.
The understanding was that in the fight to control already established mature realms, or maybe gain control of realms nearing maturity, so that the Dao Lords of each race can grow, the Temple of Fasting trained warriors who would go and fight in that war. Or, maybe, the purpose of the temple was to produce Dao Lords to take advantage of the situation?
The progress of this realm could literally affect humans across the universe by giving them a higher position on the Cosmic Ascendance Spectrum. This benefit was far greater than it seemed, and as someone who first hand experienced it, Lex could testify to this. He had managed to raise his personal level, through various means, and it allowed him better control and perception of spiritual energy.