Double Masters

Ravenous Trap

If an opponent had three or more cards put into their graveyard from anywhere this turn, you may pay {0} rather than pay this spell's mana cost.
Exile all cards from target player's graveyard.

If an opponent had three or more cards put into their graveyard from anywhere this turn, you may pay {0} rather than pay this spell's mana cost.
Exile target player's graveyard.

The List

Zendikar

If an opponent had three or more cards put into his or her graveyard from anywhere this turn, you may pay {0} rather than pay Ravenous Trap's mana cost.
Exile all cards from target player's graveyard.