Antewise

Heirloom Hammer — Regent Attack Card in Slay the Spire 2

Updated 17 Oct 2026 Source Slay the Spire 2 card data (spire-codex.com API), 577 cards retrieved 17 October 2026 By
Data status: The facts on this page were checked against the source named above. Game values can still shift with a patch, so re-check anything that looks off.
Heirloom Hammer card art
Heirloom Hammer

Deal 20 damage. Choose a Colorless card in your Hand. Add a copy of that card into your Hand.

CharacterRegent
TypeAttack
RarityRare
Cost2 Energy
TargetAnyEnemy
Total damage20
Per Energy10.00 → 12.50 upgraded

Card text

Deal 20 damage. Choose a Colorless card in your Hand. Add a copy of that card into your Hand.

Upgraded: Deal 25 damage. Choose a Colorless card in your Hand. Add a copy of that card into your Hand.

Where it sits on the curve

Measured the same way as our efficiency tier list: total damage divided by Energy.

Heirloom Hammer produces 10.00 per Energy at base and <strong>12.50</strong> upgraded. That ranks it 23 of 143 of the 143 attacks with a fixed cost. It sits in the top 85% on this measure.

The measure ignores everything that is not a number. Area damage, conditions and drawbacks are not priced in.

Other Regent cards at 2 Energy

  • Bulwark — Gain 12 Block. Forge 10.
  • Celestial Might — Deal 6 damage 3 times.
  • GUARDS!!! — Transform any number of cards in your Hand into Minion Sacrifice.
  • Genesis — At the start of your turn, gain 2 Stars.
  • Glitterstream — Gain 11 Block. Next turn, gain 5 Block.
  • Hammer Time — Whenever you Forge, all allies Forge as well.

Where to go next

All 577 cards — the full table, filterable by character. Efficiency tier list — every measurable card ranked.

Rarity system explains how often this card appears. Enchantments covers the modifiers that can change it.

Frequently asked questions

What does Heirloom Hammer do in Slay the Spire 2?

Deal 20 damage. Choose a Colorless card in your Hand. Add a copy of that card into your Hand.

What does upgrading Heirloom Hammer change?

Deal 25 damage. Choose a Colorless card in your Hand. Add a copy of that card into your Hand.

How much does Heirloom Hammer cost?

2 Energy. It is a Rare Attack card.

Is Heirloom Hammer efficient for its cost?

It produces 10.00 damage per Energy, which ranks 23 of 143 among the attacks that can be measured this way.

More Slay the Spire 2 guides

Sources

Figures and item data on this site are read from the game’s own reference wiki before publishing. Where a value could not be confirmed there, the page says so instead of filling the gap.