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 oldschool, Legal in predh, Legal in commander, Legal in duel, Legal in legacy, Legal in vintage, Legal in oathbreaker Reserved: True Price: $47.70