![Cloud Key (Retro Schematic) (Serial Numbered) [The Brothers' War Retro Artifacts] 1](https://autopartsorigin.shop/wp-content/uploads/2026/05/cloud-key-retro-schematic-serial-numbered-the-brothers-war-retro-artifacts-1.webp)
Description
| 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*
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