Supercritical Skill

Is Supercritical good in Slay the Spire 2?

Supercritical is a rare Defect skill in Slay the Spire 2. In combat it resolves as: Gain Energy. It’s a dependable, middle-of-the-pack option, landing at C tier in our rankings.

Across 428 recorded runs, decks running it win 31.4% of the time, comfortably clear of the 13.8% average, by 17.5%. It’s a more selective pick, turning up in just 1.7% of decks that could run it. Offer data backs the pick — taken 43.0% of the time it is shown, with 33.9% for runs that took it against 19.9% for runs that did not, a +13.6% pick lift across 333 decided runs. Silent players keep it in 0.2% 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 Flak Cannon — together they post a +27.8% swing in win rate. It also has strong chemistry with the relic Pantograph, which moves its win rate by +31.4%. At 0 energy, it’s upgraded in 19.4% of runs and usually joins the deck around floor 18.

Upgraded, it gains +2 Energy, which is why so many decks invest a rest-site upgrade in it. That’s 134 wins, 293 deaths, and 1 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Test Subject Boss, which closes out 6.3% of its appearances. Read on for Supercritical’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Defect run.

Pick or Skip: Supercritical

Out of 826 recorded offers Supercritical is taken 43.0% of the time, and taking it is worth +13.6% in pick lift — 33.9% for runs that picked it against 19.9% for runs that skipped, across 333 decided runs.

Taken 355 times out of 826 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 Supercritical

Supercritical is strongest when it joins the deck in Act 3, where runs win 59.3% across 27 runs — one of 4 recorded pickup windows.

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

Best Cards to Pair with Supercritical

Ranked by win-rate lift, Supercritical performs best alongside Flak Cannon (+27.8%), Echo Form (+24.3%), and Rainbow (+24.3%).

Flak Cannon+27.8%46 runsEcho Form+24.3%80 runsRainbow+24.3%28 runsMachine Learning+22.4%46 runsBulk Up+20.5%50 runsIteration+20.5%50 runs

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

Supercritical Win Rate by Class

Supercritical is played across 3 classes, led by Silent (50.0%), Defect (31.1%), and Ironclad (18.2%) by win rate.

The Silent50.0%12 runsThe Defect31.1%396 runsThe Ironclad18.2%11 runs

Best Relics for Supercritical

Supercritical pairs best with the relics Pantograph (+31.4%), Data Disk (+29.1%), and Sturdy Clamp (+27.1%), ranked by win-rate lift.

Pantograph+31.4%39 runsData Disk+29.1%59 runsSturdy Clamp+27.1%21 runsCandelabra+26.4%37 runsLizard Tail+25.4%29 runsGold-Plated Cables+25.2%16 runs

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

Supercritical Card Details

Supercritical is a rare skill costing 0 energy; it’s upgraded in 19.4% of runs and usually picked up by floor 18.

Gain Energy.

Upgrade: +2 Energy

What Ends Runs with Supercritical

Supercritical’s most common run-enders are Test Subject Boss (6.3%), Queen Boss (5.6%), and Aeonglass Boss (5.6%).

• Test Subject Boss6.3% of runs
• Queen Boss5.6% of runs
• Aeonglass Boss5.6% of runs
• Knowledge Demon Boss4.9% of runs
• Kaiser Crab Boss4.9% of runs

See Also

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