Runic Capacitor Relic

Is Runic Capacitor good in Slay the Spire 2?

Runic Capacitor is a shop relic in Slay the Spire 2. While carried, it does the following: Start each combat with additional Orb Slots. It currently underperforms most relics, sitting at D tier in our Slay the Spire 2 relic rankings.

Across 106 recorded runs, decks carrying it win 31.4% of the time, comfortably clear of the 13.8% average, by 17.6%. It’s a more situational relic, showing up in just 0.5% of runs. The class that gets the most out of it is the Defect, at a 31.4% win rate. Defect players hold onto it in 2.3% of their runs.

It combos especially well with Supercritical, worth a +28.6% win-rate swing together. Another strong card to run with it is Barrage, worth +27.4% to its win rate. On average it’s acquired around floor 23 of a run. Its shop rarity shapes how frequently you’ll run into it.

It has 33 run wins against 72 losses in our tracked data. When runs carrying it end, the most frequent culprit is Kaiser Crab Boss, which closes out 10.4% of them. Read on for Runic Capacitor’s complete card, class, and threat breakdown before you decide to pick it up.

Pick or Skip: Runic Capacitor

Out of 297 recorded offers Runic Capacitor is taken 35.4% of the time, and taking it is worth +13.3% in pick lift — 31.7% for runs that picked it against 17.1% for runs that skipped, across 104 decided runs.

Taken 105 times out of 297 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.

Best Cards with Runic Capacitor

Ranked by win-rate lift, the best cards to run with Runic Capacitor are Supercritical (+28.6%), Barrage (+27.4%), and Smokestack (+24.8%).

Supercritical+28.6%15 runsBarrage+27.4%18 runsSmokestack+24.8%16 runsSkim+21.9%15 runsGunk Up+18.6%18 runsLeap+18.6%29 runs

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

Runic Capacitor Win Rate by Class

So far Runic Capacitor is carried mainly by the Defect, who win 31.4% of their runs with it across 106 tracked.

The Defectappears in 2.3% of its runs (106 tracked)

Runic Capacitor Details

Runic Capacitor is a shop relic carried in 0.5% of runs and usually picked up around floor 23.

Start each combat with additional Orb Slots.

What Ends Runs with Runic Capacitor

Runic Capacitor’s most common run-enders are Kaiser Crab Boss (10.4%), Aeonglass Boss (5.7%), and Test Subject Boss (5.7%).

• Kaiser Crab Boss10.4% of runs
• Aeonglass Boss5.7% of runs
• Test Subject Boss5.7% of runs
• Decimillipede Elite4.7% of runs
• The Insatiable Boss4.7% of runs

See Also

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