Heartstone
(Heartstone)
- Set: Stronghold
- Color: Artifact
- Cost: 3
- Type: Artifact
- Rarity: U
- Text
Creatures' activated abilities cost 1 less to play. If this would make an ability cost 0 or less mana to play, it costs 1, plus any nonmana costs.
- Cards of equal color/cost that Heartstone
- Urza's Incubator
- Dragon Blood
- Damping Matrix
- Kyren Archive
- Whetstone
- Cards of equal cost and different color that Heartstone
- Seat of the Synod
- Darksteel Citadel
- Vault of Whispers
- Tree of Tales
- Ancient Den