Bulk Up•Power

Is Bulk Up good in Slay the Spire 2?

Bulk Up is an uncommon Defect power in Slay the Spire 2. In combat it resolves as: Lose Orb Slots. Gain 2 Strength. Gain 2 Dexterity. It’s a dependable, middle-of-the-pack option, landing at C tier in our rankings.

Across 42 recorded runs, decks running it win 32.4% of the time, comfortably clear of the 19.0% average, by 13.4%. It’s a more selective pick, turning up in just 1.1% of decks that could run it. Ironclad players keep it in 0.3% 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 Hologram — together they post a +18.6% swing in win rate. It also has strong chemistry with the relic War Paint, which moves its win rate by +19.3%. At 2 energy, it’s upgraded in 46.1% of runs and usually joins the deck around floor 20.

Upgraded, it gains +1 Strength, +1 Dexterity, which is why so many decks invest a rest-site upgrade in it. That’s 11 wins, 23 deaths, and 8 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Queen Boss, which closes out 7.1% of its appearances. Read on for Bulk Up’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Defect run.

Best Cards to Pair with Bulk Up

Ranked by win-rate lift, Bulk Up performs best alongside Hologram (+18.6%), Feral (+16.1%), and Capacitor (+14.5%).

Hologram+18.6%17 runsFeral+16.1%8 runsCapacitor+14.5%14 runsSubroutine+13.8%12 runsIteration+12.9%6 runsFight Through+12.2%4 runs

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

Bulk Up Win Rate by Class

Bulk Up is played across 2 classes, led by Ironclad (50.0%) and Defect (31.3%) by win rate.

The Ironclad50.0%2 runsThe Defect31.3%40 runs

Best Relics for Bulk Up

Bulk Up pairs best with the relics War Paint (+19.3%), Oddly Smooth Stone (+19.1%), and Joss Paper (+15.6%), ranked by win-rate lift.

War Paint+19.3%5 runsOddly Smooth Stone+19.1%6 runsJoss Paper+15.6%3 runsGlitter+15.6%3 runsPocketwatch+15.6%3 runsTuning Fork+15.6%3 runs

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

Bulk Up Card Details

Bulk Up is an uncommon power costing 2 energy; it’s upgraded in 46.1% of runs and usually picked up by floor 20.

Lose Orb Slots. Gain 2 Strength. Gain 2 Dexterity.

Upgrade: +1 Strength, +1 Dexterity

What Ends Runs with Bulk Up

Bulk Up’s most common run-enders are Queen Boss (7.1%), Slumbering Beetle Normal (4.8%), and The Insatiable Boss (4.8%).

• Queen Boss7.1% of runs
• Slumbering Beetle Normal4.8% of runs
• The Insatiable Boss4.8% of runs
• Entomancer Elite4.8% of runs
• Test Subject Boss4.8% of runs

See Also

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