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Fiend Fire artwork
The IroncladAttack

Fiend Fire

Energy
2
Rarity
Rare
Pool
Ironclad
Target
Any Enemy

Base card

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

Upgraded

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

Timing and keywords

Exhaust
Removed until the end of combat.
Used inIronclad Exhaust engine ↗
Main branchLast updated 2026-11-02
Fiend Fire (Ironclad card)/images/cards/fiend_fire.webpExhaust your Hand. Deal 7 damage for each card Exhausted.

Decisions and interactions

Ironclad Exhaust engineFiend Fire consumes the hand for repeated damage.Northernlion’s Vulnerable and Strength runHe takes Fiend Fire, develops a Block package and uses Relax to prepare later turns.

Recorded examples

Northernlion’s Vulnerable and Strength run artwork
Run study

Northernlion’s Vulnerable and Strength run

An Ascension 8 victory built around Vulnerable, Dominate and multihit attacks. Compare immediate Strength with Demon Form’s delayed return.

IroncladRecorded runStrength
Sources

Last updated 2026-11-02.

  • Game reference data: main branch

Related references

Northernlion’s Vulnerable and Strength runRun studyThe IroncladCharacter mechanics and starting kitIronclad Exhaust engineStrategy using this card, relic or characterKeywords and timing rulesExhaust timing and combat removal

Strategies using this

All strategies ↗
Ironclad Exhaust engine artwork
ironclad

Ironclad Exhaust engine

Burning Pact and Second Wind turn selected cards into draw or Block. Feel No Pain and Dark Embrace reward those exhausts, while the remaining attacks finish fights w…

ExhaustDrawBlock
SPIRE HANDBOOK

An independent Slay the Spire 2 strategy reference.

Game artwork and game data © Mega Crit. Extracted reference data and images via Spire Codex.

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