The musical sound of its turning triggers the tumblers of revelation.

Der melodische Klang, den er beim Drehen erzeugt, öffnet das Schloss der Offenbarung.

Wolkenschlüssel

Sowie der Wolkenschlüssel ins Spiel kommt, bestimme Artefakt, Kreatur, Verzauberung, Spontanzauber oder Hexerei.
Zaubersprüche des bestimmten Typs, die du wirkst, kosten beim Wirken {1} weniger.

El sonido musical de su girar abre los pestillos de la mente.

Llave de nubes

En cuanto la Llave de nubes entre al campo de batalla, elige entre artefacto, criatura, encantamiento, instantáneo o conjuro.
Te cuesta {1} menos lanzar hechizos del tipo elegido.

Le bruit musical qu'elle fait quand elle tourne ouvre la serrure de la révélation.

Clef de nuage

Au moment où la Clef de nuage arrive sur le champ de bataille, choisissez artefact, créature, enchantement, éphémère ou rituel.
Les sorts du type choisi que vous lancez coûtent {1} de moins à lancer.

Il suono musicale del suo girare innesca i cilindri della rivelazione.

Chiave delle Nuvole

Mentre la Chiave delle Nuvole entra nel campo di battaglia, scegli artefatto, creatura, incantesimo, istantaneo oppure stregoneria.
Le magie che lanci del tipo scelto costano {1} in meno per essere lanciate.

その鍵を回すときの音楽のような音は、啓示への錠を開く。

雲の鍵

雲の鍵が戦場に出るに際し、アーティファクトかインスタントかエンチャントかクリーチャーかソーサリーを選ぶ。
あなたがその選ばれたタイプの呪文を唱えるためのコストは{1}少なくなる。

A melodia emitida ao girá-lo abre os ferrolhos da revelação.

Abre-nuvem

Conforme Abre-nuvem entra no campo de batalha, escolha artefato, criatura, encantamento, mágica instantânea ou feitiço.
As mágicas que você conjura do tipo escolhido custam {1} a menos para serem conjuradas.

它转动所发出的乐音，能触动启示的机栓。

云钥

于云钥进战场时，选择神器，生物，结界，瞬间或法术。
你施放的该类别咒语减少{1}来施放。

Cloud Key

As Cloud Key enters, choose artifact, creature, enchantment, instant, or sorcery.
Spells you cast of the chosen type cost {1} less to cast.

The Brothers' War Retro Artifacts

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*

The List

Time Spiral Remastered

The cost reduction applies only to generic mana in the cost of spells of the chosen type you cast.

To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as a flashback cost), add any cost increases (such as kicker costs), then apply any cost reductions (such as that of Cloud Key's ability). The mana value of the spell is determined by only its mana cost, no matter what the total cost to cast that spell was.