Apart from that, Michael Setar, the second prince of the Empire, knew an even more secret message.
That all the high-energy advancers in the Imperial Capital, at critical moments, are the batteries for the Imperial Capital's force field generator... and also some of the pilots of its structure.
Contrary to what everyone imagines, the Imperial Capital is not an inanimate object; it is not merely a giant structure from a pre-Era civilization but rather a huge living fortress that was created after a pre-Era civilization absorbed the spark of an extraterrestrial civilization and modeled it after their supreme technology "biological planet shield generator".
Or to put it another way... a living refuge.
The Imperial Capital is alive. It is an elder that survived the Calamity of Heavenly Fall, enduring millennia of trials and still existing, possessing power that is considered extremely formidable even at the Fifth Energy Level, having witnessed the many trials and wars of this land.