Key

Key is an artifact type introduced in Mystery Booster on a Test card. 
==Description==
Key appears on the <c>Corrupted Key</c> test card as an artifact type. It currently has no rules meaning or function by itself, but other cards and abilities may refer to it. Corrupted Key grants an ability to creatures when tapped but cannot be tapped on its own, instead it’s rules mention it needs another card to tap it or “turn the key”.Corrupted Key on the Gatherer
==References==
Category:Test cards