Caltrops Power

Is Caltrops good in Slay the Spire 2?

Caltrops is an event Event power in Slay the Spire 2. In combat it resolves as: Whenever you are attacked, deal 3 damage back. It currently underperforms most alternatives, sitting at D tier in our Slay the Spire 2 card rankings.

Across 62 recorded runs, decks running it win 13.1% of the time, trailing the 14.3% average by 1.2%. It’s a more selective pick, turning up in just 0.2% of decks that could run it. Silent players keep it in 0.5% 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 Prepared — together they post a +4.1% swing in win rate. It also has strong chemistry with the relic Ring of the Snake, which moves its win rate by +4.0%. At 1 energy, it’s upgraded in 20.6% of runs and usually joins the deck around floor 8.

That’s 8 wins, 53 deaths, and 1 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Soul Fysh Boss, which closes out 8.1% of its appearances. Read on for Caltrops’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Event run.

When to Pick Up Caltrops

Caltrops is strongest when it joins the deck in Act 1, where runs win 13.1% across 62 runs — one of 1 recorded pickup windows.

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

Best Cards to Pair with Caltrops

Ranked by win-rate lift, Caltrops performs best alongside Prepared (+4.1%), Defend (+4.0%), and Strike (+4.0%).

Prepared+4.1%15 runsDefend+4.0%27 runsStrike+4.0%27 runsNeutralize+3.5%28 runsSurvivor+3.5%28 runsAscender's Bane-5.0%43 runs

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

Caltrops Win Rate by Class

Caltrops is played across 2 classes, led by Silent (17.9%) and Ironclad (10.0%) by win rate.

The Silent17.9%28 runsThe Ironclad10.0%10 runs

Best Relics for Caltrops

Caltrops pairs best with the relics Ring of the Snake (+4.0%), ranked by win-rate lift.

Ring of the Snake+4.0%27 runs

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

Caltrops Card Details

Caltrops is an event power costing 1 energy; it’s upgraded in 20.6% of runs and usually picked up by floor 8.

Whenever you are attacked, deal 3 damage back.

What Ends Runs with Caltrops

Caltrops’s most common run-enders are Soul Fysh Boss (8.1%), Knowledge Demon Boss (8.1%), and Infested Prisms Elite (6.5%).

• Soul Fysh Boss8.1% of runs
• Knowledge Demon Boss8.1% of runs
• Infested Prisms Elite6.5% of runs
• The Insatiable Boss6.5% of runs
• Test Subject Boss6.5% of runs

See Also

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