The Key to the Vault OTJ 0054 · rare

The Key to the Vault · {1}{U} · Legendary Artifact — Equipment · Whenever equipped creature deals combat damage to a player, look at that many cards from the top of your library. You may exile a nonland card from among them. Put the rest on the bottom of your library in a random order. You may cast the exiled card without paying its mana cost. Equip {2}{U}