Mana Crypt [Double Masters] Serpent if that spell's mana cost

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

nonland permanent

Set: Secret Lair Drop Series Type: Instant Rarity: Rare Cost: {2}{W} If you control a commander

Set: Kaladesh Inventions Type: Artifact Creature — Shapeshifter Rarity: Mythic Cost: {6} Imprint — When Duplicant enters the battlefield

Set: Modern Horizons 3 Prerelease Promos Type: Instant — Eldrazi Rarity: Rare Cost: {X}{C}{C} Choose two Ń

Mana Crypt [Double Masters] Serpent if that spell's mana costSet: Double Masters Type: Artifact Rarity: Mythic Cost: {0} At the beginning of your upkeep, flip a coin. If you lose the flip, Mana Crypt deals 3 damage to you. {T}: Add {C}{C}.