Antewise

Sword Boomerang — Ironclad 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.
Sword Boomerang card art
Sword Boomerang

Deal 3 damage to a random enemy 3 times.

CharacterIronclad
TypeAttack
RarityCommon
Cost1 Energy
TargetRandomEnemy
Total damage9
Per Energy9.00 → 9.00 upgraded
Hits3 × 3

Card text

Deal 3 damage to a random enemy 3 times.

Upgraded: Deal 3 damage to a random enemy 4 times.

Where it sits on the curve

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

Sword Boomerang produces 9.00 per Energy at base . That ranks it 54 of 143 of the 143 attacks with a fixed cost. It sits in the top 63% on this measure.

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

Other Ironclad cards at 1 Energy

  • Aggression — At the start of your turn, put a random Attack from your Discard Pile into your Hand and U
  • Armaments — Gain 5 Block. Upgrade a card in your Hand.
  • Ashen Strike — Deal 6 damage. Deals 3 additional damage for each card in your Exhaust Pile.
  • Body Slam — Deal damage equal to your Block.
  • Break — Deal 20 damage. Apply 5 Vulnerable.
  • Breakthrough — Lose 1 HP. Deal 9 damage to ALL enemies.

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 Sword Boomerang do in Slay the Spire 2?

Deal 3 damage to a random enemy 3 times.

What does upgrading Sword Boomerang change?

Deal 3 damage to a random enemy 4 times.

How much does Sword Boomerang cost?

1 Energy. It is a Common Attack card.

Is Sword Boomerang efficient for its cost?

It produces 9.00 damage per Energy, which ranks 54 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.