It looks like someone's linked the top of the rules document to what seems like essentially a copy/paste of the magic rules used in other games similar to this, in particular bringing to mind this one
I have to say, I really didn't think the rules for magic, casting, and juice were well done in that game. It was fun to play with for a while, but the joy of it was in exploiting and breaking the system, not in actually playing the game. Many of the spells were wildly unbalanced, many of the caster types didn't have anything approaching reasonable capabilities either when taken independently or when compared to each other, and the whole thing was full of logic holes and annoyances. I seriously hope that we're not actually going to be using that. If nothing else, if we're using those rules then the upkeep cost of certain caster types should be about tripled from what it is now.