Vraska, Golgari Empress

+2: Put a petrification counter on target creature. It gains defender and becomes a colorless artifact in addition to its other types.
0: Put the top six cards of your library into your graveyard, then return a creature or land card from your graveyard to your hand.
-9: Exile each creature with a petrification counter on it, then return them to the battlefield under your control.