Mystery Key⁣ - Commander Legends: Battle for Baldur's Gate⁣ (Uncommon)⁣ [85]

Mystery Key is an equipment that lets you draw three cards when the creature it’s attached to deals combat damage to a player. After you draw the cards, you have to sacrifice the Mystery Key, so it provides a one-time burst of card advantage rather than a permanent effect. You'd want to play this in a deck where you can reliably deal combat damage, ideally with creatures that have evasion or are likely to get through blockers, but keep in mind that once you use it, it’s gone, so it’s best when you can leverage that card draw to make a big impact.