Gredolf, Perfect Skaberen

Protection from cards in graveyards and spells cast from graveyards
When Gredolf enters the battlefield, return target creature card from your graveyard to your hand. Create a 1/1 white Human creature token.
When Gredolf attacks, target player puts the top 2 cards of his or her library into his or her graveyard. If a land is put into a graveyard this way, regenerate Gredolf.