Cloud Key (Retro Schematic) (Serialized) [The Brothers' War Retro Artifacts] U-CRU053 so we can afford to

so we can afford to make the medlas out of gold

you can hijack an opponent's Normal Spell/Trap Card or monster effect

if a hero has 2 or more cards with yellow color strips in their pitch zone

create a Frostbite token under their control

Cloud Key (Retro Schematic) (Serialized) [The Brothers' War Retro Artifacts] U-CRU053 so we can afford toSet: The Brothers' War Retro Artifacts Type: Artifact Rarity: Rare Cost: {3} As Cloud Key enters the battlefield, choose artifact, creature, enchantment, instant, or sorcery. Spells you cast of the chosen type cost {1} less to cast. "A key only unlocks a door. Its wielder must choose whether to cross the threshold." *Hurkyl's Metaphysics, vol. II*