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 Set Code: STH-U, H09-U, PLST-U Legality: Legal in predh, Legal in legacy, Legal in vintage, Legal in duel, Legal in commander, Legal in premodern, Legal in oathbreaker Price: $1.78 Foil price: $5.75