Cloud Key (Retro Schematic) (Serialized) [The Brothers' War Retro Artifacts] Illustration Rare that many plus one +

that many plus one + 1/+1 counters are put on it instead

Set: Secret Lair Drop Series Type: Artifact Creature — Construct Rarity: Rare Cost: {X}{X} Walking Ballista enters the battlefield with X +1/+1 counters on it

you play it this turn

you may choose both instead

defying Elesh Norn's commands

Cloud Key (Retro Schematic) (Serialized) [The Brothers' War Retro Artifacts] Illustration Rare that many plus one +Set: 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*