Mindslaver [Scars of Mirrodin] Fire [+20] if that spell's mana cost

if that spell's mana cost is {3}{U}{U}

Set: Zendikar Rising Commander Type: Sorcery Rarity: Uncommon Cost: {3}{U}{B} Each player mills two cards

"Civilization is the sum of Ephara's gifts

Set: Khans of Tarkir Prerelease Promos Type: Creature — Human Shaman Rarity: Rare Cost: {1}{G} {T}: Add {G}

Teferi's Sentinel gets +4/+0

Mindslaver [Scars of Mirrodin] Fire [+20] if that spell's mana costSet: Scars of Mirrodin Type: Legendary Artifact Rarity: Mythic Cost: {6} {4}, {T}, Sacrifice Mindslaver: You control target player during that player's next turn. (You see all cards that player could see and make all decisions for the player.) It's a helm that leaves the head at its most vulnerable.