Raven Queen, God of Darkness

Indestructible
Raven Queen, God of Darkness can't attack
or block unless you have 7 or more cards in your graveyard.
{2}{g}: Sacrifice a creature. If you do draw cards
equal to its converted mana cost.
{2}{b}{b}{t}: Return target creature from your
graveyard to the battlefield. Activate this ability
only any time you could cast a sorcery.