Ravenous Trap [Zendikar]

Ravenous Trap [Zendikar]Set: Zendikar Type: Instant Trap Rarity: Uncommon Cost: {2}{B}{B} 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.

Set: EX: Crystal Guardians Type: Psychic Rarity: Common Retreat cost: Colorless

Set: Sun & Moon: Forbidden Light Type: Darkness Rarity: Holo Rare Retreat cost: Colorless

Set: Alpha Edition Type: Enchantment Rarity: Uncommon Cost: {3}{R} Attacking creatures you control get +1/+0

Other Wizards you control get +1/+1

Its controller gains life equal to its mana value

Set: Scars of Mirrodin Type: Artifact Rarity: Common Cost: {3} Necrogen Censer enters the battlefield with two charge counters on it

Supplicants offer flesh and silver

Activate only once each turn

it also deals 4 damage to target player or planeswalker

but the rest of them never will

Set: Commander 2014 Type: Creature — Zombie Rarity: Rare Cost: {4}{B} Deathtouch

Vraska Type: Sorcery Rarity: Uncommon Cost: {1}{B} You draw two cards and you lose 2 life