@Keb wrote:
I think that she was called the original power, but not more powerful. I believe that dark magic is more powerful than anything but true love, because the price is high.
I don’t think that BF is capable of paying the price for dark magic, and so her power is far more limited. They’ve said that it requires a pure heart to get her to come, and she seems capable only of granting a very deep wish under particular conditions (like being selfless, brave, and true or whatever–it’s said that August couldn’t have been transformed if he was not).
I agree. It appears that the Blue Fairy’s magic, while powerful, is limited by things outside of her control. She can’t just cast a spell to do anything she wants but she can manipulate certain pre-existing conditions. The requirement that Pinocchio be selfless, brave, and true is the clearest example. She also stated on several occasions that there are things she can’t do: she couldn’t undo the effects of becoming The Dark One on Rumple, she couldn’t transform Gepetto’s parents, etc… I think this is part of the reason that fairies don’t have to pay the kind of price that users of dark magic must pay. Someone else (sorry, I can’t remember who) also mentioned the fact that the fairies can’t fall in love may be the price they pay for their magic.
So dark magic is more of a “Give me what I want and here’s the payment” sort of bargain while fairy magic is more like an altruistic sort of ability to find things that can make other people happy.