雲（くも）の鍵（かぎ）
Artifact
As this artifact enters, choose artifact, creature, enchantment, instant, or sorcery.
Spells you cast of the chosen type cost 
less to cast.
The advent of cloudsculpting ended the use of mechanical locks in Illvoi society.
イラスト：
Edge of Eternities Commander#54レア日本語価格情報なし