Cavern of Souls [Modern Masters 2017] Shadows over Innistrad Prerelease Promos Spend this mana only to

Spend this mana only to cast artifact spells

−6: You get an emblem with "Swamps you control have '{T}: Add {B}{B}{B}{B}

Maro-Sorcerer's power and toughness are each equal to the total number of cards in all players' hands

Set: Portal Three Kingdoms Type: Creature — Human Soldier Rarity: Rare Cost: {3}{R} Horsemanship (This creature can't be blocked except by creatures with horsemanship

then sacrifices the rest

Cavern of Souls [Modern Masters 2017] Shadows over Innistrad Prerelease Promos Spend this mana only toSet: Modern Masters 2017 Type: Land Rarity: Mythic As Cavern of Souls enters the battlefield, choose a creature type. {T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.