Demon Form•Power

Is Demon Form good in Slay the Spire 2?

Demon Form is a rare Ironclad power in Slay the Spire 2. In combat it resolves as: At the start of your turn, gain 2 Strength. It ranks among the strongest cards its class can draft right now, earning a spot at B tier in our Slay the Spire 2 card tier list.

Across 64 recorded runs, decks running it win 36.8% of the time, comfortably clear of the 19.0% average, by 17.9%. It’s a more selective pick, turning up in just 1.7% of decks that could run it. Regent players keep it in 0.1% of their runs, so it’s a familiar sight in those decks. On average it shows up 1.0 times in the decks that take it.

It performs best next to Infernal Blade — together they post a +17.9% swing in win rate. It also has strong chemistry with the relic Anchor???, which moves its win rate by +18.1%. At 3 energy, it’s upgraded in 45.5% of runs and usually joins the deck around floor 19.

That’s 21 wins, 36 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 9.4% of its appearances. Read on for Demon Form’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Ironclad run.

Best Cards to Pair with Demon Form

Ranked by win-rate lift, Demon Form performs best alongside Infernal Blade (+17.9%), Juggling (+17.0%), and Feed (+14.6%).

Infernal Blade+17.9%15 runsJuggling+17.0%9 runsFeed+14.6%4 runsStampede+13.9%17 runsBully+11.4%8 runsCrimson Mantle+11.2%6 runs

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

Demon Form Win Rate by Class

Demon Form is played across 3 classes, led by Regent (100.0%), Silent (100.0%), and Ironclad (34.5%) by win rate.

The Regent100.0%1 runsThe Silent100.0%1 runsThe Ironclad34.5%62 runs

Best Relics for Demon Form

Demon Form pairs best with the relics Anchor??? (+18.1%), Strike Dummy??? (+18.1%), and Nutritious Soup (+17.4%), ranked by win-rate lift.

Anchor???+18.1%4 runsStrike Dummy???+18.1%4 runsNutritious Soup+17.4%7 runsPendulum+16.6%11 runsHappy Flower???+14.6%3 runsSmall Capsule+14.6%4 runs

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

Demon Form Card Details

Demon Form is a rare power costing 3 energy; it’s upgraded in 45.5% of runs and usually picked up by floor 19.

At the start of your turn, gain 2 Strength.

What Ends Runs with Demon Form

Demon Form’s most common run-enders are Queen Boss (9.4%), Test Subject Boss (7.8%), and The Insatiable Boss (7.8%).

• Queen Boss9.4% of runs
• Test Subject Boss7.8% of runs
• The Insatiable Boss7.8% of runs
• Bowlbugs Normal4.7% of runs
• Kaiser Crab Boss4.7% of runs

See Also

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