How about Summon Dev Journal on the Magic System?
it's the closest thing to +infinity available...
I am guessing that the magic system is something that they feel like they can work out the details fairly late in the dev cycle (and they are probably right) So we may not even have a good idea on the magic system in the early betas. I mean there will be spells, I hope, considering the title, but they may just be placeholders at first with no intention that they will be in the final version....