Horn of Deafening [Legends] God you may pay 4 life

you may pay 4 life rather than pay this spell's mana cost

The Sunken Ruin houses all the learning of a long-forgotten age

if you control seven or more lands

Set: Champions of Kamigawa Type: Artifact — Equipment Rarity: Rare Cost: {4} Equipped creature has shroud

Set: Kaladesh Prerelease Promos Type: Enchantment Rarity: Rare Cost: {W} Creatures your opponents control enter the battlefield tapped

Horn of Deafening [Legends] God you may pay 4 lifeSet: Legends Type: Artifact Rarity: Rare Cost: {4} {2}, {T}: Prevent all combat damage that would be dealt by target creature this turn. "A blast, an echo . . . then silence."