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’s a dependable, middle-of-the-pack option, landing at C tier in our rankings.

Across 407 recorded runs, decks running it win 28.7% of the time, comfortably clear of the 13.8% average, by 14.8%. It’s a more selective pick, turning up in just 1.9% of decks that could run it. Offer data backs the pick — taken 39.6% of the time it is shown, with 31.5% for runs that took it against 29.3% for runs that did not, a +2.1% pick lift across 340 decided runs. Ironclad players keep it in 8.5% 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 Offering — together they post a +22.7% swing in win rate. It also has strong chemistry with the relic Pocketwatch, which moves its win rate by +43.9%. At 3 energy, it’s upgraded in 40.8% of runs and usually joins the deck around floor 18.

That’s 115 wins, 286 deaths, and 6 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Queen Boss, which closes out 7.4% 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.

Pick or Skip: Demon Form

Out of 886 recorded offers Demon Form is taken 39.6% of the time, and taking it is worth +2.1% in pick lift — 31.5% for runs that picked it against 29.3% for runs that skipped, across 340 decided runs.

Taken 351 times out of 886 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 Demon Form

Demon Form is strongest when it joins the deck in Act 3, where runs win 68.0% across 25 runs — one of 4 recorded pickup windows.

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

Best Cards to Pair with Demon Form

Ranked by win-rate lift, Demon Form performs best alongside Offering (+22.7%), Cascade (+20.9%), and Tear Asunder (+20.9%).

Offering+22.7%52 runsCascade+20.9%24 runsTear Asunder+20.9%19 runsStoke+19.5%25 runsOne-Two Punch+19.4%50 runsSecond Wind+18.3%28 runs

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

Demon Form Win Rate by Class

Demon Form is drafted only by the Ironclad, where it holds a 28.7% win rate across 393 runs.

The Ironcladappears in 8.5% of its runs (393 tracked)

Best Relics for Demon Form

Demon Form pairs best with the relics Pocketwatch (+43.9%), Pantograph (+36.9%), and Vambrace (+27.1%), ranked by win-rate lift.

Pocketwatch+43.9%16 runsPantograph+36.9%31 runsVambrace+27.1%31 runsShuriken+26.4%17 runsMolten Egg+24.4%18 runsOrichalcum+24.2%37 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 40.8% of runs and usually picked up by floor 18.

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 (7.4%), Aeonglass Boss (5.9%), and Kaiser Crab Boss (4.7%).

• Queen Boss7.4% of runs
• Aeonglass Boss5.9% of runs
• Kaiser Crab Boss4.7% of runs
• The Insatiable Boss4.2% of runs
• Test Subject Boss3.9% of runs

See Also

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