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Knowledge VaultClick or tap the image to zoom Knowledge Vault
Artifact  ,  : Exile the top card of your library face down.
 : Sacrifice this artifact. If you do, discard your hand, then put all cards exiled with this artifact into their owner's hand.
When this artifact leaves the battlefield, put all cards exiled with it into their owner's graveyard.Artist: Amy Weber Color identity: Colorless Reference pricesMTGO: 0.04 tix Data snapshot 2026-10-22. Not live offers. Use in a combo · Use in a deck Editions & versions2 printings across 2 editions. Choose a printing to view its artwork and details. Reference prices · Data snapshot 2026-10-22. Prices vary by seller and condition; — means no quote.  No printings match. Try another edition, number, or treatment. Combos using this cardNo combos yet. Format legality
Rulings2009-10-01 If you activate Knowledge Vault's second ability, all that happens at that time is that you pay a cost of {0}. As the ability resolves, you must sacrifice Knowledge Vault. This is mandatory. If you are able to do so, you discard your hand and put all cards exiled with Knowledge Vault into their owners' hands. If you aren't able to do so because Knowledge Vault left the battlefield or changed controllers before the ability resolves, nothing happens. 2009-10-01 You don't get to look at the cards exiled with Knowledge Vault. 2008-10-01 You can activate the second ability any time you have priority, including in response to itself. However, you will only be able to sacrifice the Vault as the first such ability resolves. Current Oracle text is shown for every printing.
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