Name: Knowledge Vault Cost: 4 CMC: 4 Color: CID: Type: Artifact Rules Text: {2}, {T}: Exile the top card of your library face down. {0}: 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. Set/Rarity: Legends rare, Masters Edition III uncommon Set Code: LEG-R, ME3-U Legality: Legal in commander, Legal in legacy, Legal in predh, Legal in duel, Legal in oathbreaker, Legal in vintage Reserved: True Price: $41.78