Sidisi, Brood Tyrant [Khans of Tarkir Prerelease Promos] Apocalypse Promos Buyback {3} (You may pay

Buyback {3} (You may pay an additional {3} as you cast this spell

When Gilded Drake enters the battlefield

Exile the top six cards of your library

−12: Exile all cards from target player's library

put Soldevi Excavations onto the battlefield

Sidisi, Brood Tyrant [Khans of Tarkir Prerelease Promos] Apocalypse Promos Buyback {3} (You may paySet: Khans of Tarkir Prerelease Promos Type: Legendary Creature Naga Shaman Rarity: Mythic Cost: {1}{B}{G}{U} Whenever Sidisi, Brood Tyrant enters the battlefield or attacks, mill three cards. Whenever one or more creature cards are put into your graveyard from your library, create a 2 2 black Zombie creature token.