Flame Barrier Skill

Is Flame Barrier good in Slay the Spire 2?

In Slay the Spire 2, Flame Barrier is an uncommon skill from the Ironclad card pool. Its effect: Gain 12 Block. Whenever you are attacked this turn, deal damage back. The data flags it as a weaker pick, settling at D tier — usually one to pass on unless your deck specifically wants it.

Over 777 tracked runs its win rate sits at 22.1%, 8.3% ahead of the 13.8% all-deck baseline. It sees niche play, included in only 3.7% of eligible runs. Offer data argues the other way: taken 36.3% of the time it is shown, runs that picked it win 22.0% against 25.3% for runs that passed — a -3.2% pick lift across 637 decided runs. Within Ironclad runs it’s drafted 16.5% of the time, making it a regular part of that class’s decks. Decks that include it run about 1.1 copies on average.

Its standout pairing so far is Prolong, which lifts its win rate by +28.6% when the two share a deck. On the relic side, Molten Egg is its standout companion, worth a +36.6% win-rate swing alongside it. It costs 2 energy, gets upgraded 34.5% of the time, and tends to be picked up near floor 15.

Upgrading the card adds +4 Block to its stat line. Of the runs that drafted it, 170 ended in victory against 598 deaths and 9 abandons. Its most common run-ender is Kaiser Crab Boss, finishing 8.0% of the runs it shows up in. See the synergies, class split, and threats below for the full picture of where Flame Barrier fits a Ironclad deck.

Pick or Skip: Flame Barrier

Players take Flame Barrier in 36.3% of the 1908 offers it appears in; those runs win 22.0% against 25.3% for runs that passed, a pick lift of -3.2% over 637 decided runs.

Taken 692 times out of 1908 offers.

Pick rate when offered counts offers, not runs: out of every time the game put this in front of a player, how often it was taken. It is not the same number as the share of runs that end up containing it.

Pick lift is the sample-adjusted gap between runs that took the option and runs that passed on it. It is the fair way to rank choices, because raw win rates put the smallest samples on top.

When to Pick Up Flame Barrier

Of the 4 pickup windows recorded for Flame Barrier, Act 3 is the best: 55.6% across 54 runs.

Win rate of runs by the act Flame Barrier entered the deck. Acts that have not reached the sample floor show their run count only.

Best Cards to Pair with Flame Barrier

Flame Barrier’s strongest card pairings so far are Prolong (+28.6%), Mad Science (+26.6%), and Juggernaut (+22.0%), each shown with the win-rate lift it adds.

Prolong+28.6%20 runsMad Science+26.6%54 runsJuggernaut+22.0%75 runsStoke+21.8%52 runsMaster of Strategy+21.0%16 runsDoubt+20.9%23 runs

Based on small co-occurring samples — treat these as early signals, not final verdicts.

Flame Barrier Win Rate by Class

Exclusive to the Ironclad, Flame Barrier posts a 22.2% win rate over 762 tracked runs.

The Ironcladappears in 16.5% of its runs (762 tracked)

Best Relics for Flame Barrier

The relics that swing Flame Barrier’s win rate the most are Molten Egg (+36.6%), Sword of Jade (+36.4%), and Mummified Hand (+33.7%), with each lift shown.

Molten Egg+36.6%21 runsSword of Jade+36.4%16 runsMummified Hand+33.7%28 runsLee's Waffle+29.9%26 runsUnsettling Lamp+28.4%28 runsKifuda+26.7%15 runs

Based on small co-occurring samples — treat these as early signals, not final verdicts.

Flame Barrier Card Details

A 2-energy uncommon skill, Flame Barrier is upgraded 34.5% of the time and tends to enter the deck around floor 15.

Gain 12 Block. Whenever you are attacked this turn, deal damage back.

Upgrade: +4 Block

What Ends Runs with Flame Barrier

Runs holding Flame Barrier end most often against Kaiser Crab Boss (8.0%), Test Subject Boss (5.3%), and Queen Boss (5.1%) — the share of its runs each accounts for is shown.

• Kaiser Crab Boss8.0% of runs
• Test Subject Boss5.3% of runs
• Queen Boss5.1% of runs
• The Insatiable Boss5.1% of runs
• Decimillipede Elite4.9% of runs

See Also

Keep exploring Slay the Spire 2 tier lists and stats below.