second filter.
There are spells from my world to cancel out other spells, or restore things to their normal state after they've been transfigured into something else, but with really strong magic you've often got to be really specific and this magic probably isn't the same as mine.
And I can't just try to transfigure stone into human, because - well, I could possibly figure out how to do it for just a limb or two, especially if they were my limbs. But getting all her insides in a way that they work right would be a challenge, not to mention her mind and her personality and soul and all that, I'd never be able to get all that right.
I don't think we have a rite like yours. Never heard of it if we do, anyway.