Coolheaded•Skill

Is Coolheaded good in Slay the Spire 2?

Coolheaded is a common Defect skill in Slay the Spire 2. In combat it resolves as: Channel 1 Frost. Draw cards. It currently underperforms most alternatives, sitting at D tier in our Slay the Spire 2 card rankings.

Across 157 recorded runs, decks running it win 26.6% of the time, comfortably clear of the 18.9% average, by 7.7%. It’s a more selective pick, turning up in just 4.2% of decks that could run it. Defect players keep it in 26.9% of their runs, so it’s a familiar sight in those decks. On average it shows up 1.3 times in the decks that take it.

It performs best next to Rocket Punch — together they post a +17.8% swing in win rate. It also has strong chemistry with the relic Anchor, which moves its win rate by +29.3%. At 1 energy, it’s upgraded in 33.3% of runs and usually joins the deck around floor 12.

Upgraded, it gains +1 Cards, which is why so many decks invest a rest-site upgrade in it. That’s 33 wins, 91 deaths, and 33 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Queen Boss, which closes out 8.3% of its appearances. Read on for Coolheaded’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Defect run.

Best Cards to Pair with Coolheaded

Ranked by win-rate lift, Coolheaded performs best alongside Rocket Punch (+17.8%), Ice Lance (+15.0%), and Fusion (+14.6%).

Rocket Punch+17.8%19 runsIce Lance+15.0%10 runsFusion+14.6%13 runsUltimate Defend+13.7%9 runsNull+12.9%18 runsCapacitor+12.8%52 runs

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

Coolheaded Win Rate by Class

Coolheaded is drafted only by the Defect, where it holds a 26.6% win rate across 157 runs.

The Defectappears in 26.9% of its runs (157 tracked)

Best Relics for Coolheaded

Coolheaded pairs best with the relics Anchor (+29.3%), Fragrant Mushroom (+21.7%), and Meal Ticket (+19.7%), ranked by win-rate lift.

Anchor+29.3%21 runsFragrant Mushroom+21.7%12 runsMeal Ticket+19.7%14 runsParrying Shield+19.4%12 runsPrecise Scissors+17.8%5 runsData Disk+17.1%21 runs

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

Coolheaded Card Details

Coolheaded is a common skill costing 1 energy; it’s upgraded in 33.3% of runs and usually picked up by floor 12.

Channel 1 Frost. Draw cards.

Upgrade: +1 Cards

What Ends Runs with Coolheaded

Coolheaded’s most common run-enders are Queen Boss (8.3%), Kaiser Crab Boss (6.4%), and Test Subject Boss (6.4%).

• Queen Boss8.3% of runs
• Kaiser Crab Boss6.4% of runs
• Test Subject Boss6.4% of runs
• Lagavulin Matriarch Boss3.2% of runs
• Aeonglass Boss3.2% of runs

See Also

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