Jon Chung
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That's great; but like I said, the Primordial War is in the grand scheme of things of the actual gamable setting, is something that's never been approached as something something to ever to be gamable and the game IMO shouldn't even touch that to being gamable state since it leads to the ridlousnes nonsense of fighting TED in ROSTE. Thus its actual relevance to the Creation in the time of tumult is pretty much nill outside a few throwaway lines in a prelude.
You don't have to make the Primordial War gamable, but you do have to make it plausible within the constraints of the game rules, because there are known events in the setting's history that require certain things to be possible/impossible.
For example, history states that the Dragon-Blooded surprised and massacred a whole bunch of Solars at the Calibration Feast, so if the mechanics come together to say "one Solar can kill an arbitrary number of Dragon-Blooded" or "Solars cannot be surprised, all plots will be infallibly discovered", you've probably got bad mechanics: if these powers existed, the setting cannot exist, so those powers get kicked out.
Or, from the other end of the scale, you can't make, say, a Third Circle fetich demon like Ligier capable of soloing all 700 Celestial Exalted, because, again, the setting has the Exalted fighting the Primordials and winning as historical fact. If it's mechanically impossible for them to win that contest based on some power you give to fetich demons (eg: "fetich demons have unlimited motes"), then, that power is bad mechanics, kick it out.
The "P-War OK / Usurpation OK" thing is primarily about trying to make sure that any powers written don't retroactively make the setting history impossible, because that would be dumb.
e: We can also say that, for example, Eclipses were obviously valuable in the P-War because historically they were, so whatever the P-War looked like, it obviously had stuff where a travel/bureaucracy/large-scale propaganda expert would be useful. Logistics and morale matter.
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