Me and a friend were talking today about the lore behind the allagans, and there was one thing that we were weren't sure of. The bound primals that are kept in azyz lla (the warring triad) are supposed to be a power source right? Well my questions are...

A) How are they being contained? Doesn't it take a great deal of prayer and aether crystals to keep a primal summoned like that? And it has been said that these primals have been contained for thousands of years, where is all this aether coming from?

B) if they have so much aether to fuel the primals, whats the point of containing the primals in the first place?

I know that these questions might have clear and obvious answers, but could someone more lore-versed explain how this process works?