Cloud Key (Retro Schematic) [The Brothers' War Retro Artifacts] Karn If a permanent entering the

If a permanent entering the battlefield causes a triggered ability of a permanent you control to trigger

Set: Unknown Event Type: Creature — Vedalken Artificer Rarity: Common Cost: {1}{U} Spells you cast have affinity for artifact creatures that weren't originally artifact creatures

Set: Jumpstart 2022 Type: Legendary Creature — Demon Spirit Rarity: Rare Cost: {3}{B}{B} At the beginning of each player's upkeep

where X is its power

Set: Year of the Tiger 2022 Type: Legendary Creature — Dinosaur Cat Nightmare Rarity: Rare Cost: {1}{R}{W}{B} Mutate {2}{B/R}{W}{W} (If you cast this spell for its mutate cost

Cloud Key (Retro Schematic) [The Brothers' War Retro Artifacts] Karn If a permanent entering theSet: 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