Antewise

Fiend Fire — 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.
Fiend Fire card art
Fiend Fire

Exhaust your Hand. Deal 7 damage for each card Exhausted.

CharacterIronclad
TypeAttack
RarityRare
Cost2 Energy
TargetAnyEnemy
Total damage7
Per Energy3.50 → 5.00 upgraded
KeywordsExhaust

Card text

Exhaust your Hand. Deal 7 damage for each card Exhausted.

Upgraded: Exhaust your Hand. Deal 10 damage for each card Exhausted.

Where it sits on the curve

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

Fiend Fire produces 3.50 per Energy at base and <strong>5.00</strong> upgraded. That ranks it 137 of 143 of the 143 attacks with a fixed cost. It sits in the top 5% 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 2 Energy

  • Bash — Deal 8 damage. Apply 2 Vulnerable.
  • Blood Wall — Lose 2 HP. Gain 16 Block.
  • Cinder — Deal 18 damage. Exhaust 1 card at random.
  • Dark Embrace — Whenever a card is Exhausted, draw 1 card.
  • Expect a Fight — Gain 1 Energy for each Attack in your Hand. You cannot gain additional 1 Energy this turn.
  • Fight Me! — Deal 5 damage twice. Gain 3 Strength. The enemy gains 1 Strength.

Other cards with Exhaust

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 Fiend Fire do in Slay the Spire 2?

Exhaust your Hand. Deal 7 damage for each card Exhausted.

What does upgrading Fiend Fire change?

Exhaust your Hand. Deal 10 damage for each card Exhausted.

How much does Fiend Fire cost?

2 Energy. It is a Rare Attack card.

Is Fiend Fire efficient for its cost?

It produces 3.50 damage per Energy, which ranks 137 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.