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 modern, Legal in historic, Legal in oathbreaker, Legal in legacy, Legal in commander, Legal in duel, Legal in timeless, Legal in vintage, Legal in penny, Legal in predh, Legal in gladiator, Legal in brawl Price: $0.36 Foil price: $0.32