Cloud Key (Schematic) (Serial Numbered)

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 numbered series of 500 copies of this card was found within the The Brothers' War Collector Booster product. The number on the card you receive will vary from the number pictured in the listing unless otherwise shown in a Listing with Photo.

"A key only unlocks a door. Its wielder must choose whether to cross the threshold." —Hurkyl's Metaphysics, vol. II