Name: Keening Stone Cost: 6 CMC: 6 Color: CID: Type: Artifact Rules Text: {5}, {T}: Target player mills X cards, where X is the number of cards in that player's graveyard. Set/Rarity: Rise of the Eldrazi rare, Commander 2016 rare, The Brothers' War Retro Artifacts rare Legality: Legal in timeless, Legal in legacy, Legal in penny, Legal in historic, Legal in duel, Legal in modern, Legal in vintage, Legal in brawl, Legal in gladiator, Legal in oathbreaker, Legal in predh, Legal in commander Price: $0.32 Foil price: $0.31