Prowess•Power

Is Prowess good in Slay the Spire 2?

In Slay the Spire 2, Prowess is an uncommon power from the Colorless card pool. Its effect: Gain 1 Strength. Gain 1 Dexterity. 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 33 tracked runs its win rate sits at 50.0%, 31.1% ahead of the 18.9% all-deck baseline. It sees niche play, included in only 0.9% of eligible runs. Within Silent runs it’s drafted 0.6% 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 Crimson Mantle, which lifts its win rate by +14.3% when the two share a deck. On the relic side, Happy Flower is its standout companion, worth a +16.7% win-rate swing alongside it. It costs 1 energy, gets upgraded 45.7% of the time, and tends to be picked up near floor 18.

Upgrading the card adds +1 Dexterity, +1 Strength to its stat line. Of the runs that drafted it, 13 ended in victory against 13 deaths and 7 abandons. Its most common run-ender is The Insatiable Boss, finishing 6.1% of the runs it shows up in. See the synergies, class split, and threats below for the full picture of where Prowess fits a Colorless deck.

Best Cards to Pair with Prowess

Prowess’s strongest card pairings so far are Crimson Mantle (+14.3%), Pyre (+11.5%), and Offering (+11.5%), each shown with the win-rate lift it adds.

Crimson Mantle+14.3%4 runsPyre+11.5%3 runsOffering+11.5%3 runsPommel Strike+10.0%5 runsThunderclap+10.0%5 runsAccuracy+8.3%3 runs

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

Prowess Win Rate by Class

Of the 5 classes that draft Prowess, it performs best with Silent (66.7%), Necrobinder (66.7%), and Ironclad (60.0%).

The Silent66.7%6 runsThe Necrobinder66.7%4 runsThe Ironclad60.0%12 runsThe Regent40.0%5 runsThe Defect20.0%6 runs

Best Relics for Prowess

The relics that swing Prowess’s win rate the most are Happy Flower (+16.7%), Whetstone (+14.3%), and Sword of Jade (+14.3%), with each lift shown.

Happy Flower+16.7%5 runsWhetstone+14.3%6 runsSword of Jade+14.3%4 runsThe Chosen Cheese+14.3%4 runsKusarigama+12.5%6 runsBag of Preparation+12.5%6 runs

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

Prowess Card Details

A 1-energy uncommon power, Prowess is upgraded 45.7% of the time and tends to enter the deck around floor 18.

Gain 1 Strength. Gain 1 Dexterity.

Upgrade: +1 Dexterity, +1 Strength

What Ends Runs with Prowess

Runs holding Prowess end most often against The Insatiable Boss (6.1%) — the share of its runs each accounts for is shown.

• The Insatiable Boss6.1% of runs

See Also

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