Fiend FireAttack
Exhaust your Hand. Deal 7 damage for each card Exhausted.
Is Fiend Fire good in Slay the Spire 2?
In Slay the Spire 2, Fiend Fire is a rare attack from the Ironclad card pool. Its effect: Exhaust your Hand. Deal 7 damage for each card Exhausted. Right now it’s a premium pick that sits at B tier — one of the better cards you can add to a deck this run.
Over 4 tracked runs its win rate sits at 25.0%, 12.4% ahead of the 12.6% all-deck baseline. It sees niche play, included in only 0.8% of eligible runs. Within Ironclad runs it’s drafted 8.2% of the time, making it a regular part of that class’s decks. Decks that include it run about 1.0 copies on average.
Its standout pairing so far is Evil Eye, which lifts its win rate by +8.3% when the two share a deck. On the relic side, Burning Blood is its standout companion, worth a 0.0% win-rate swing alongside it. It costs 2 energy, gets upgraded 75.0% of the time, and tends to be picked up near floor 23.
Upgrading the card adds +3 Damage to its stat line. Of the runs that drafted it, 1 ended in victory against 3 deaths and 0 abandons. See the synergies, class split, and threats below for the full picture of where Fiend Fire fits a Ironclad deck.
Fiend Fire Win Rate & Pick Rate
At a 25.0% win rate, Fiend Fire runs 12.4% ahead of the 12.6% all-deck baseline — the bars below put the two side by side.
Run Outcomes with Fiend Fire
Across the 4 tracked runs that drafted Fiend Fire, 1 ended in a win and 3 in a loss — a 25.0% win share, counting abandons as losses.
- Wins 25.0%
- Losses 75.0%
Best Cards to Pair with Fiend Fire
Fiend Fire’s strongest card pairings so far are Evil Eye (+8.3%), Bash (+8.3%), and Twin Strike (+8.3%), each shown with the win-rate lift it adds.
Based on small co-occurring samples — treat these as early signals, not final verdicts.
Fiend Fire Win Rate by Class
Exclusive to the Ironclad, Fiend Fire posts a 25.0% win rate over 4 tracked runs.
The Ironcladappears in 8.2% of its runs (4 tracked)Best Relics for Fiend Fire
The relics that swing Fiend Fire’s win rate the most are Burning Blood (0.0%), with each lift shown.
Based on small co-occurring samples — treat these as early signals, not final verdicts.
Fiend Fire Card Details
A 2-energy rare attack, Fiend Fire is upgraded 75.0% of the time and tends to enter the deck around floor 23.
Exhaust your Hand. Deal 7 damage for each card Exhausted.
Upgrade: +3 Damage
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Fiend Fire – Frequently Asked Questions
Is Fiend Fire good in Slay the Spire 2?
Across 4 tracked runs, Fiend Fire has a 25.0% win rate — +12.4% above the average deck. Win rate reflects how often runs that include the card end in victory.
What does Fiend Fire do in Slay the Spire 2?
Fiend Fire costs 2 energy. Exhaust your Hand. Deal 7 damage for each card Exhausted.
What class is Fiend Fire in Slay the Spire 2?
Fiend Fire is a Rare Ironclad Attack.
Is Fiend Fire worth upgrading in Slay the Spire 2?
Players upgrade Fiend Fire in 75.0% of runs. Upgrading it grants +3 Damage.
What is the best relic for Fiend Fire?
In tracked runs, Fiend Fire has performed best alongside Burning Blood, which lifts its win rate by 0.0% over 4 runs together.
See Also
Keep exploring Slay the Spire 2 tier lists and stats below.