Dark Magician Girl

Hexproof
Dark Magician Girl gets +1/+1 for each
Wizard, Instant and sorcery in your graveyard.
Whenever you cast an instant or sorcery, you
may exile a number of wizards from your
graveyard equal to the casting cost of that instant
or sorcery, and if you do, copy that instant
or sorcery without paying it's mana cost, you
may choose a new target for the copy.