Name: Heartstone Cost: 3 CMC: 3 Color: CID: Type: Artifact Rules Text: Activated abilities of creatures cost {1} less to activate. This effect can't reduce the mana in that cost to less than one mana. Set/Rarity: Stronghold uncommon, Premium Deck Series: Slivers uncommon, The List uncommon Legality: Legal in premodern, Legal in commander, Legal in legacy, Legal in oathbreaker, Legal in predh, Legal in duel, Legal in vintage Price: $1.21 Foil price: $3.63