Quote Originally Posted by tkcrispy View Post
Bahamut was imprisoned for millennia, yet there was no sign of crystals in the coils. It's also been mentioned that many other Primals like beings have been captured by the allagans, do they imprison each with a life supply of crystals?
Primal don't necessarily need crystals. It's a misconception. Primal need aether for sustainment. It just so happens that corrupted crystals are a wellspring of aether in a tangible form, thus making it possible to accumulate them without technology. Allag had no need for them since their devices captured the sun's energy. Their tech was so advanced they could twist and manipulate aether at will. The internment hulks that bound Bahamut kept funneling aether into him. That plus the endless prayers of the imprisoned dragons fueled his eternal existence. Even after he was struck down by Louisoix, the hulks kept trying to rebuild him. The whole Coil premise was to shut down the IHs to stop Bahamut's regeneration.