, Exile two cards from your graveyard: Draw a card.
If damage would be dealt to you, prevent that damage. Exile a card from your graveyard for each 1 damage prevented this way.
When there are no cards in your graveyard, you lose the game.
If an opponent had three or more cards put into their graveyard from anywhere this turn, you may pay rather than pay this spell's mana cost.
Exile target player's graveyard.