Maggie, Shapeshifter

0: Transform Maggie, Shapeshifter into any other Maggie planeswalker in your library, hand, or graveyard
-1: Search your library for another blue source, you may cast it for half of each type of mana it has
-5: Take a Maggie Planeswalker you ownfrom outside the game and put it on the bottom of your library