>So let me make sure I understand. I can now make magic less or
>more reliable, depending on which side of the fence I am on?

That's roughly correct. However:

- This means magic can also work better than the standard. Imagine a global spellcraft-like effect on all spells cast. Imagine unpredictable but nonetheless striking effects of high magic. Imagine a tougher ram or dolphin than you've ever seen laying waste.

- This also means you can make Battle powers more or less reliable depending on which side of the fence you're on.