Knife Trap•Skill

Is Knife Trap good in Slay the Spire 2?

In Slay the Spire 2, Knife Trap is a rare skill from the Silent card pool. Its effect: Play every Shiv in your Exhaust Pile on the enemy. Right now it’s a premium pick that sits at S tier — one of the better cards you can add to a deck this run.

Over 79 tracked runs its win rate sits at 58.2%, 39.3% ahead of the 19.0% all-deck baseline. It sees niche play, included in only 2.1% of eligible runs. Within Silent runs it’s drafted 8.0% of the time, making it a regular part of that class’s decks. Decks that include it run about 1.0 copies on average.

Its standout pairing so far is Blade of Ink, which lifts its win rate by +17.2% when the two share a deck. On the relic side, Blood Vial is its standout companion, worth a +18.9% win-rate swing alongside it. It costs 2 energy, gets upgraded 39.0% of the time, and tends to be picked up near floor 20.

Of the runs that drafted it, 39 ended in victory against 28 deaths and 12 abandons. Its most common run-ender is Hunter Killer Normal, finishing 5.1% of the runs it shows up in. See the synergies, class split, and threats below for the full picture of where Knife Trap fits a Silent deck.

Best Cards to Pair with Knife Trap

Knife Trap’s strongest card pairings so far are Blade of Ink (+17.2%), Mad Science (+14.5%), and Afterimage (+14.2%), each shown with the win-rate lift it adds.

Blade of Ink+17.2%7 runsMad Science+14.5%9 runsAfterimage+14.2%16 runsPrepared+12.4%30 runsFootwork+12.4%12 runsInfinite Blades+11.8%35 runs

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

Knife Trap Win Rate by Class

Exclusive to the Silent, Knife Trap posts a 58.2% win rate over 79 tracked runs.

The Silentappears in 8.0% of its runs (79 tracked)

Best Relics for Knife Trap

The relics that swing Knife Trap’s win rate the most are Blood Vial (+18.9%), Horn Cleat (+18.6%), and Sturdy Clamp (+18.6%), with each lift shown.

Blood Vial+18.9%18 runsHorn Cleat+18.6%8 runsSturdy Clamp+18.6%8 runsOddly Smooth Stone+17.9%20 runsOrichalcum+17.2%7 runsStrike Dummy+14.9%13 runs

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

Knife Trap Card Details

A 2-energy rare skill, Knife Trap is upgraded 39.0% of the time and tends to enter the deck around floor 20.

Play every Shiv in your Exhaust Pile on the enemy.

What Ends Runs with Knife Trap

Runs holding Knife Trap end most often against Hunter Killer Normal (5.1%), Knowledge Demon Boss (3.8%), and Queen Boss (3.8%) — the share of its runs each accounts for is shown.

• Hunter Killer Normal5.1% of runs
• Knowledge Demon Boss3.8% of runs
• Queen Boss3.8% of runs
• Infested Prisms Elite2.5% of runs
• Spiny Toad Normal2.5% of runs

See Also

Keep exploring Slay the Spire 2 tier lists and stats below.