Capacitor•Power

Is Capacitor good in Slay the Spire 2?

Capacitor is an uncommon Defect power in Slay the Spire 2. In combat it resolves as: Gain Orb Slots. It currently underperforms most alternatives, sitting at D tier in our Slay the Spire 2 card rankings.

Across 388 recorded runs, decks running it win 20.7% of the time, comfortably clear of the 13.9% average, by 6.8%. It’s a more selective pick, turning up in just 3.4% of decks that could run it. Offer data is close to a wash — 37.5% of offers taken, 20.2% for runs that picked it against 21.0% for runs that skipped, a pick lift of just -0.8% over 282 decided runs. Defect players keep it in 23.0% 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 Fasten — together they post a +24.0% swing in win rate. It also has strong chemistry with the relic Art of War, which moves its win rate by +31.0%. At 1 energy, it’s upgraded in 30.0% of runs and usually joins the deck around floor 16.

Upgraded, it gains +1 Repeat, which is why so many decks invest a rest-site upgrade in it. That’s 79 wins, 302 deaths, and 7 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Queen Boss, which closes out 7.2% of its appearances. Read on for Capacitor’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Defect run.

Pick or Skip: Capacitor

Out of 842 recorded offers Capacitor is taken 37.5% of the time, and taking it is worth -0.8% in pick lift — 20.2% for runs that picked it against 21.0% for runs that skipped, across 282 decided runs.

Taken 316 times out of 842 offers.

Pick rate when offered counts offers, not runs: out of every time the game put this in front of a player, how often it was taken. It is not the same number as the share of runs that end up containing it.

Pick lift is the sample-adjusted gap between runs that took the option and runs that passed on it. It is the fair way to rank choices, because raw win rates put the smallest samples on top.

When to Pick Up Capacitor

Capacitor is strongest when it joins the deck in Act 3, where runs win 54.9% across 52 runs — one of 3 recorded pickup windows.

Win rate of runs by the act Capacitor entered the deck. Acts that have not reached the sample floor show their run count only.

Best Cards to Pair with Capacitor

Ranked by win-rate lift, Capacitor performs best alongside Fasten (+24.0%), Prolong (+23.6%), and Machine Learning (+17.7%).

Fasten+24.0%17 runsProlong+23.6%15 runsMachine Learning+17.7%52 runsSupercritical+17.5%54 runsReboot+17.4%41 runsSignal Boost+16.7%41 runs

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

Capacitor Win Rate by Class

Capacitor is drafted only by the Defect, where it holds a 20.8% win rate across 386 runs.

The Defectappears in 23.0% of its runs (386 tracked)

Best Relics for Capacitor

Capacitor pairs best with the relics Art of War (+31.0%), Data Disk (+27.7%), and Membership Card (+24.0%), ranked by win-rate lift.

Art of War+31.0%23 runsData Disk+27.7%51 runsMembership Card+24.0%17 runsJoss Paper+23.6%24 runsSai+23.6%15 runsLucky Fysh+21.4%21 runs

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

Capacitor Card Details

Capacitor is an uncommon power costing 1 energy; it’s upgraded in 30.0% of runs and usually picked up by floor 16.

Gain Orb Slots.

Upgrade: +1 Repeat

What Ends Runs with Capacitor

Capacitor’s most common run-enders are Queen Boss (7.2%), Kaiser Crab Boss (5.2%), and Test Subject Boss (4.4%).

• Queen Boss7.2% of runs
• Kaiser Crab Boss5.2% of runs
• Test Subject Boss4.4% of runs
• Decimillipede Elite4.4% of runs
• Aeonglass Boss4.4% of runs

See Also

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