Well, it kind of does. When you cast a spell, you can ask your sponsor to help you, giving you +2 on whatever you are doing. Every time you do so, you incur debt, which is a pre-accepted compel from your sponsor. So the next time your sponsor asks you to do something, you HAVE to do it, there is no way out of it. The more debt you have, the more he can boss you around. And like I said, that doesn't have to be in the form of "quests" or anything, it can be all sorts of things in line with the sponsors agenda. This is not a financial debt, by the way. Just saying, because you connected it to your characters resources.
But again I have to ask you, in the words of Billy: "Keep it simple, silly."
I know it is tempting to go at the powers like an all you can eat buffet. Trust me, I've done the same. And granted, it works pretty good in a lot of games. Here though, I feel, that it is way easier and more satisfying, if you have a solid concept for your character first and then pick your powers accordingly.
Kind of like this:
He is the son of two sorcerers that have since lost their powers, and he can only employ his magic by creating items.
-> ritual(crafting) + a few refresh worth of refinement
As a master craftsman, he was found worthy by hephaestos to use a magical smithy and create magic items to fight decay and destruction.
-> place of power (probably also + refinement)
