Exigents

Discount Exalted. Basically, every god has the capacity to carve out some of their own power and then give it to a mortal as a permanent upgrade. This would probably result in all humanity being Exalted in short order given how literally every blade of grass has a god and everyone wants their own action figure, were it not for the Law of Diminishment-if you're going to make something that's going to be great and perhaps eternal, you have to permanently give it some of your own power. 
Hell, the first time the Sun set was when he made the Solars, and that was just stamping his name on the things Autocthon already made! This is often more than what lesser gods can take and what greater gods, being dicks, are willing to give up, hence why they're saved for emergencies. Once that happens though, they each get a custom Charmset, for a personal style of kicking ass.
And you guessed it, that's all we're gonna know until the hardback.