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. Performance-wise it’s a solid if unspectacular include, rated C tier overall.

Over 530 tracked runs its win rate sits at 44.1%, 29.9% ahead of the 14.3% all-deck baseline. It sees niche play, included in only 2.0% of eligible runs. When it is actually offered players take it 40.5% of the time, and that looks correct: those runs win 46.8% against 32.5% for runs that passed, a +14.0% pick lift over 440 decided runs. Within Silent runs it’s drafted 9.0% of the time, making it a regular part of that class’s decks. Decks that include it run about 1.2 copies on average.

Its standout pairing so far is Adrenaline, which lifts its win rate by +26.1% when the two share a deck. On the relic side, Ornamental Fan is its standout companion, worth a +26.5% win-rate swing alongside it. It costs 2 energy, gets upgraded 48.9% of the time, and tends to be picked up near floor 19.

Of the runs that drafted it, 233 ended in victory against 295 deaths and 2 abandons. Its most common run-ender is Aeonglass Boss, finishing 5.8% 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.

Pick or Skip: Knife Trap

Players take Knife Trap in 40.5% of the 1169 offers it appears in; those runs win 46.8% against 32.5% for runs that passed, a pick lift of +14.0% over 440 decided runs.

Taken 474 times out of 1169 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 Knife Trap

Of the 4 pickup windows recorded for Knife Trap, Act 3 is the best: 74.3% across 36 runs.

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

Best Cards to Pair with Knife Trap

Knife Trap’s strongest card pairings so far are Adrenaline (+26.1%), Shadow Step (+23.4%), and Mad Science (+23.3%), each shown with the win-rate lift it adds.

Adrenaline+26.1%104 runsShadow Step+23.4%37 runsMad Science+23.3%47 runsAfterimage+23.2%109 runsStorm of Steel+23.0%84 runsBlade of Ink+18.7%92 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 44.1% win rate over 526 tracked runs.

The Silentappears in 9.0% of its runs (526 tracked)

Best Relics for Knife Trap

The relics that swing Knife Trap’s win rate the most are Ornamental Fan (+26.5%), Nunchaku (+26.3%), and Fragrant Mushroom (+25.7%), with each lift shown.

Ornamental Fan+26.5%68 runsNunchaku+26.3%64 runsFragrant Mushroom+25.7%45 runsBrilliant Scarf+25.5%15 runsSturdy Clamp+25.4%29 runsTungsten Rod+25.2%19 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 48.9% of the time and tends to enter the deck around floor 19.

Play every Shiv in your Exhaust Pile on the enemy.

What Ends Runs with Knife Trap

Runs holding Knife Trap end most often against Aeonglass Boss (5.8%), Knowledge Demon Boss (5.1%), and Test Subject Boss (4.7%) — the share of its runs each accounts for is shown.

• Aeonglass Boss5.8% of runs
• Knowledge Demon Boss5.1% of runs
• Test Subject Boss4.7% of runs
• Queen Boss4.0% of runs
• Kaiser Crab Boss3.0% of runs

See Also

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