CascadeCascade
Heartstone

Heartstone

{3}

Artifact

Activated abilities of creatures cost {1} less to activate. This effect can't reduce the mana in that cost to less than one mana.

"Finding a true heartstone is even harder than finding a true heart." —Hanna

Illustrated by

StrongholdStronghold#134·Uncommon·English
Oct 22, 2026
Market$2.47
Median$2.63
Buy on TCGPlayer

Legality

LegalCommanderNot legalStandardNot legalModernLegalPremodernLegalLegacyLegalVintageNot legalBrawlNot legalPioneer
LegalOathbreaker
Not legalPauperNot legalHistoric
Not legalTimeless

Rulings

Oct 4, 2004

The cost reduction can be applied to additional costs.

Oct 4, 2004

It will not add a {1} to abilities with no generic mana in their activation cost.

Oct 4, 2004

It will never reduce any colored mana portion of an activation cost.

Jul 15, 2006

Can’t reduce Snow mana costs.

Jun 8, 2016

Activated abilities contain a colon. They’re generally written “[Cost]: [Effect].” Some keywords are activated abilities and will have colons in their reminder text.