First printed in Stronghold (1998)
All 4 prints
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The List (PLST) #H09-26, 2024
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The List (PLST) #STH-134, 2023
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Premium Deck Series: Slivers (H09) #26, 2009
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Stronghold (STH) #134, 1998
Heartstone 
Artifact
Activated abilities of creatures cost 
less to activate. This effect can't reduce the mana in that cost to less than one mana.
Legality
- Legal in
- Legacy, Vintage, Premodern, Commander, Duel Commander, PreDH, Tiny Leaders, Oathbreaker
- Not legal in
- Standard, Pioneer, Modern, Pauper, Future Standard, Historic, Timeless, Alchemy, Penny Dreadful, Old School 93/94, Gladiator, Pauper Commander, Brawl, Standard Brawl, Competitive Brawl
MTGO price: 0.07 TIX, the cheapest non-foil print (average sell price on GoatBots, 28 Oct 2026).
Combos
166 combos from Commander Spellbook, the most popular first.
- Infinite creature tokens, Infinite creature ETB: Cloudshredder Sliver + Gemhide Sliver + Heartstone + Sliver Queen
- Infinite creature tokens, Infinite creature ETB: Cloudshredder Sliver + Heartstone + Manaweft Sliver + Sliver Queen
- Infinite untap of artifact creatures you control: Heartstone + Palladium Myr + Voltaic Construct
- Infinite colorless mana, Infinite creature tokens…: Ashnod's Altar + Heartstone + Sliver Queen
- Infinite creature tokens, Infinite creature ETB: Blur Sliver + Heartstone + Manaweft Sliver + Sliver Queen
- Infinite creature tokens, Infinite creature ETB: Blur Sliver + Gemhide Sliver + Heartstone + Sliver Queen
- Infinite colorless mana: Basalt Monolith + Heartstone + Karn, the Great Creator
- Infinite colorless mana: Basalt Monolith + Heartstone + Myr Welder
- Infinite colorless mana: Basalt Monolith + Heartstone + Karn, Silver Golem
- Infinite colorless mana: Basalt Monolith + Heartstone + Toymaker
