Wait a minute. Is that the same sort of way we got Practice?
Not precisely...
I hate to say it but I think Practice comes from the Dragons tapping the power of Sacrifice, and effectively their
entire race was sacrificed for humanity.
The joke might be that we're a Magical Girl society, but the truth I suspect to be more that we're kind of running with Exalted Dragon-Blooded, in a sense...
But then, why the ever-growing power? Their pilots ALSO were sacrificed, and I'm willing to bet those deaths are what tied the Dragon's greater sacrifice and the power behind it to humanity, as well as providing the 'spark' for the lesser baseline 'Potential' power normal humans have. Potentials like Amanda Hawk, on the other hand, are the 'Dragon-Blooded'-the people lucky enough to directly tap the power of the dragons. It's ever-growing I'd bet because the dragons were too young. Because they barely got a chance to really do anything, it's literally what they potentially could have done that's powering humanity right now. Whenever the Dragons themselves would have died out for one reason or another, that's when the power-well for Potentials runs dry, I think.
Which implies there's SOMETHING watching/tallying how much effect a given Race might have wrought, or somehow the weight of their existence needs to play out in some form, and getting killed in the crib like that? Just means a bigger bang. Now to the Shiplords!
I suspect that the Shiplords, 'help cultivate' said power via their fleet battles in general, and the Tribute fleets taking a large portion of the population is how they keep Practice out of the hands of other races-they're farming us for the 'bioslurry' to prevent the build-up required to get Potentials, and we got up-jumped because they weren't testing one sapient race, they tested two, and one gave themselves up for the other. That's that sacrifice stuff that the Shiplords so love, and it's WHY they don't like the Second Secret- it's not hard to take it and make some sort of servant race that only exists to serve their masters, and it's not hard to go from there to outright sacrificing them for the power of Practice, of Potentials, and to grow drunk off it.
I THINK this theory keeps the Shiplords from being ENTIRELY stupid, and it'd explain the ban behind the Second Secret, the Shiplords' standard operations, and why Humanity seems to be so out of context for them. They're used to seeing Races that have our Potentials KNOW precisely what they did to get that, and to be hungry for more, more, MORE! And once they figure out how to get it from other races...
...I wonder if the Tribute Fleets are so revered because they're actually the limit of non-Secret technology, or from a time before the Shiplords started doing the Bioslurry thing. I suspect given the precedent set by the Medicant, that Regular and War Fleet ships are made via the power of that Bioslurry, and thus the Tribute Fleets are basically 'retro' Shiplords- think something like historical re-enactors taking stuff like Viking tactics from the Viking era and trying to use it against another Empire that's fighting with all it's got, versus modern day armies with the finest doctrines and equipment Humanity has to offer.
Of course, I could be hilariously wrong, or dead on the money and not find out until next year when this Quest-chain finally gets to the point Snowfire can reveal what's going on behind the scenes.