Infernal Blade•Skill

Is Infernal Blade good in Slay the Spire 2?

Infernal Blade is an uncommon Ironclad skill in Slay the Spire 2. In combat it resolves as: Add a random Attack into your Hand. It's free to play this turn. It’s a dependable, middle-of-the-pack option, landing at C tier in our rankings.

Across 97 recorded runs, decks running it win 33.7% of the time, comfortably clear of the 18.9% average, by 14.8%. It’s a more selective pick, turning up in just 2.6% of decks that could run it. Regent players keep it in 0.1% of their runs, so it’s a familiar sight in those decks. On average it shows up 1.2 times in the decks that take it.

It performs best next to Demon Form — together they post a +19.8% swing in win rate. It also has strong chemistry with the relic Red Skull, which moves its win rate by +23.1%. At 1 energy, it’s upgraded in 47.4% of runs and usually joins the deck around floor 15.

Upgraded, it gains -1 EnergyCost, which is why so many decks invest a rest-site upgrade in it. That’s 28 wins, 55 deaths, and 14 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Test Subject Boss, which closes out 7.2% of its appearances. Read on for Infernal Blade’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Ironclad run.

Best Cards to Pair with Infernal Blade

Ranked by win-rate lift, Infernal Blade performs best alongside Demon Form (+19.8%), Believe in You (+18.9%), and Mad Science (+18.3%).

Demon Form+19.8%15 runsBelieve in You+18.9%4 runsMad Science+18.3%8 runsJuggling+18.0%15 runsRupture+15.7%15 runsCrimson Mantle+15.7%13 runs

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

Infernal Blade Win Rate by Class

Infernal Blade is played across 3 classes, led by Regent (100.0%), Silent (33.3%), and Ironclad (32.9%) by win rate.

The Regent100.0%1 runsThe Silent33.3%3 runsThe Ironclad32.9%93 runs

Best Relics for Infernal Blade

Infernal Blade pairs best with the relics Red Skull (+23.1%), Kusarigama (+22.5%), and The Chosen Cheese (+21.4%), ranked by win-rate lift.

Red Skull+23.1%11 runsKusarigama+22.5%12 runsThe Chosen Cheese+21.4%7 runsAnchor+20.1%13 runsRegal Pillow+20.1%16 runsMango???+18.9%4 runs

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

Infernal Blade Card Details

Infernal Blade is an uncommon skill costing 1 energy; it’s upgraded in 47.4% of runs and usually picked up by floor 15.

Add a random Attack into your Hand. It's free to play this turn.

Upgrade: -1 EnergyCost

What Ends Runs with Infernal Blade

Infernal Blade’s most common run-enders are Test Subject Boss (7.2%), Doormaker Boss (6.2%), and Infested Prisms Elite (5.2%).

• Test Subject Boss7.2% of runs
• Doormaker Boss6.2% of runs
• Infested Prisms Elite5.2% of runs
• Decimillipede Elite4.1% of runs
• The Insatiable Boss4.1% of runs

See Also

Compare Infernal Blade with the rest of the best Slay the Spire 2 cards, relics, and classes below.