Anastasia, polymorpher

+3: Turn planswalker into a 10/8 giant wolf card or 10/6 sea dragon. (effects can be reverted anytime.)
-3: turn allied card into a 6/3 enchanted wolf card or lesser sea dragon or enemy card into a 2/1 wolf (effects are permanent)
-8: Turn planswalker into a large Raven card (effects permanent unless polymorph card is still on battlefield and pay {3}{g}{g}{b}{u})