Board Thread:Show-Related Questions and Answers/@comment-5817180-20150420215015/@comment-25926288-20150707195859

Pinnochio was a piece of (enchanted) wood. As long as the requiremnets were met she could turn him into a real boy.

So, in essence, she brought an inanimate thing to life, then made it "real" and then was able to recast the spell.

Blue is incredibly powerful, but she places limits on herself. She uses only for lawful good and she only uses fairy dust. As we did see that she has light magic of her own and was able to use it (and an item) to free the Apprentice. I think that Blue never uses her light magic to avoid abuse, corruption, and the price, which is why she and the fairies use fairy dust.