Crimson Mantle•Power

Is Crimson Mantle good in Slay the Spire 2?

In Slay the Spire 2, Crimson Mantle is a rare power from the Ironclad card pool. Its effect: At the start of your turn, lose 1 HP and gain 8 Block. Right now it’s a premium pick that sits at S tier — one of the better cards you can add to a deck this run.

Over 62 tracked runs its win rate sits at 41.5%, 22.6% ahead of the 18.9% all-deck baseline. It sees niche play, included in only 1.6% of eligible runs. Within Ironclad runs it’s drafted 8.5% 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 Cruelty, which lifts its win rate by +20.4% when the two share a deck. On the relic side, Venerable Tea Set is its standout companion, worth a +20.0% win-rate swing alongside it. It costs 1 energy, gets upgraded 33.3% of the time, and tends to be picked up near floor 19.

Of the runs that drafted it, 22 ended in victory against 31 deaths and 9 abandons. Its most common run-ender is Test Subject Boss, finishing 6.5% of the runs it shows up in. See the synergies, class split, and threats below for the full picture of where Crimson Mantle fits a Ironclad deck.

Best Cards to Pair with Crimson Mantle

Crimson Mantle’s strongest card pairings so far are Cruelty (+20.4%), Regret (+16.7%), and Prowess (+16.7%), each shown with the win-rate lift it adds.

Cruelty+20.4%9 runsRegret+16.7%4 runsProwess+16.7%4 runsBattle Trance+14.6%22 runsOffering+14.2%11 runsJuggling+14.2%11 runs

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

Crimson Mantle Win Rate by Class

Of the 3 classes that draft Crimson Mantle, it performs best with Ironclad (43.1%), Necrobinder (0.0%), and Regent (0.0%).

The Ironclad43.1%60 runsThe Necrobinder0.0%1 runsThe Regent0.0%1 runs

Best Relics for Crimson Mantle

The relics that swing Crimson Mantle’s win rate the most are Venerable Tea Set (+20.0%), Regal Pillow (+17.2%), and Bowler Hat (+16.7%), with each lift shown.

Venerable Tea Set+20.0%13 runsRegal Pillow+17.2%10 runsBowler Hat+16.7%4 runsOrichalcum+15.7%6 runsNeow's Bones+13.5%3 runsSelf-Forming Clay+13.5%3 runs

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

Crimson Mantle Card Details

A 1-energy rare power, Crimson Mantle is upgraded 33.3% of the time and tends to enter the deck around floor 19.

At the start of your turn, lose 1 HP and gain 8 Block.

What Ends Runs with Crimson Mantle

Runs holding Crimson Mantle end most often against Test Subject Boss (6.5%), Queen Boss (6.5%), and Knowledge Demon Boss (4.8%) — the share of its runs each accounts for is shown.

• Test Subject Boss6.5% of runs
• Queen Boss6.5% of runs
• Knowledge Demon Boss4.8% of runs
• Fabricator Normal4.8% of runs
• Mecha Knight Elite3.2% of runs

See Also

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