Maulgraf, the Ancient Root

Undergrowth- When Maulgraf, the Ancient Root enters the battlefield, destroy X target creatures where X is the number of creature cards in your graveyard. Then, sacrifice two creatures.
Whene Maulgraf, the Ancient Root dies, you may sacrifice two creatures. If you do, return Maulgraf to your hand.
Spells your opponents cast that target Maulgraf cost {1} more to cast.