Double Energy•Skill

Is Double Energy good in Slay the Spire 2?

Double Energy is an uncommon Defect skill in Slay the Spire 2. In combat it resolves as: Double your Energy. It currently underperforms most alternatives, sitting at F tier in our Slay the Spire 2 card rankings.

Across 82 recorded runs, decks running it win 19.2% of the time, right in line with the typical deck. It’s a more selective pick, turning up in just 2.2% of decks that could run it. Defect players keep it in 14.0% 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 Shatter — together they post a +24.8% swing in win rate. It also has strong chemistry with the relic Lantern, which moves its win rate by +22.5%. At 1 energy, it’s upgraded in 26.7% of runs and usually joins the deck around floor 17.

Upgraded, it gains -1 EnergyCost, which is why so many decks invest a rest-site upgrade in it. That’s 15 wins, 63 deaths, and 4 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Knowledge Demon Boss, which closes out 9.8% of its appearances. Read on for Double Energy’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Defect run.

Best Cards to Pair with Double Energy

Ranked by win-rate lift, Double Energy performs best alongside Shatter (+24.8%), FTL (+20.5%), and Squash (+20.3%).

Shatter+24.8%8 runsFTL+20.5%15 runsSquash+20.3%5 runsSkim+19.2%8 runsLeap+16.5%31 runsReboot+15.2%13 runs

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

Double Energy Win Rate by Class

Double Energy is drafted only by the Defect, where it holds a 19.2% win rate across 82 runs.

The Defectappears in 14.0% of its runs (82 tracked)

Best Relics for Double Energy

Double Energy pairs best with the relics Lantern (+22.5%), Joss Paper (+18.6%), and Sturdy Clamp (+18.6%), ranked by win-rate lift.

Lantern+22.5%9 runsJoss Paper+18.6%3 runsSturdy Clamp+18.6%3 runsPandora's Box+18.6%3 runsSai+15.9%4 runsDragon Fruit+15.9%4 runs

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

Double Energy Card Details

Double Energy is an uncommon skill costing 1 energy; it’s upgraded in 26.7% of runs and usually picked up by floor 17.

Double your Energy.

Upgrade: -1 EnergyCost

What Ends Runs with Double Energy

Double Energy’s most common run-enders are Knowledge Demon Boss (9.8%), Queen Boss (7.3%), and Phantasmal Gardeners Elite (6.1%).

• Knowledge Demon Boss9.8% of runs
• Queen Boss7.3% of runs
• Phantasmal Gardeners Elite6.1% of runs
• Lagavulin Matriarch Boss4.9% of runs
• Mytes Normal4.9% of runs

See Also

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