Golgar, Hollow One

At the beginning of your upkeep, you may shuffle the cards in your graveyard facedown, then reveal the top card, if it is a creature, you may pay {b}{g}{b/g}, or its converted mana cost, and if you do, put it on the battlefield under your control, if it is not a creature, you may pay {b/g} to add it to your hand.
If this card is sent to the graveyard, you may exile this card and shuffle your graveyard into your deck.