Cavern of Souls [Modern Masters 2017] Shadows over Innistrad Prerelease Promos defending player exiles the top

defending player exiles the top twenty cards of their library

it gets +2/+2 until end of turn

Yellow Scarves General can't block

Citizens are free to do as they wish

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

Cavern of Souls [Modern Masters 2017] Shadows over Innistrad Prerelease Promos defending player exiles the topSet: 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.