Secret Weapon Skill

Is Secret Weapon good in Slay the Spire 2?

In Slay the Spire 2, Secret Weapon is a rare skill from the Colorless card pool. Its effect: Put an Attack from your Draw Pile into your Hand. Performance-wise it’s a solid if unspectacular include, rated C tier overall.

Over 100 tracked runs its win rate sits at 45.9%, 32.1% ahead of the 13.8% all-deck baseline. It sees niche play, included in only 0.4% of eligible runs. When it is actually offered players take it 0.9% of the time, and that looks correct: those runs win 52.9% against 28.0% for runs that passed, a +15.7% pick lift over 17 decided runs. Within Ironclad runs it’s drafted 0.7% of the time, making it a regular part of that class’s decks. Decks that include it run about 1.1 copies on average.

Its standout pairing so far is Headbutt, which lifts its win rate by +19.2% when the two share a deck. On the relic side, Bag of Marbles is its standout companion, worth a +27.9% win-rate swing alongside it. It costs 0 energy, gets upgraded 29.4% of the time, and tends to be picked up near floor 27.

Of the runs that drafted it, 45 ended in victory against 53 deaths and 2 abandons. Its most common run-ender is Aeonglass Boss, finishing 8.0% of the runs it shows up in. See the synergies, class split, and threats below for the full picture of where Secret Weapon fits a Colorless deck.

Pick or Skip: Secret Weapon

Players take Secret Weapon in 0.9% of the 1968 offers it appears in; those runs win 52.9% against 28.0% for runs that passed, a pick lift of +15.7% over 17 decided runs.

Taken 17 times out of 1968 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 Secret Weapon

Of the 3 pickup windows recorded for Secret Weapon, Act 3 is the best: 55.8% across 44 runs.

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

Best Cards to Pair with Secret Weapon

Secret Weapon’s strongest card pairings so far are Headbutt (+19.2%), Shrug It Off (+14.7%), and Tremble (+14.1%), each shown with the win-rate lift it adds.

Headbutt+19.2%17 runsShrug It Off+14.7%19 runsTremble+14.1%21 runsPommel Strike+12.7%20 runsDefend+11.9%37 runsStrike+9.7%37 runs

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

Secret Weapon Win Rate by Class

Of the 5 classes that draft Secret Weapon, it performs best with Ironclad (59.5%), Silent (45.0%), and Regent (41.7%).

The Ironclad59.5%38 runsThe Silent45.0%21 runsThe Regent41.7%12 runsThe Necrobinder33.3%15 runsThe Defect28.6%14 runs

Best Relics for Secret Weapon

The relics that swing Secret Weapon’s win rate the most are Bag of Marbles (+27.9%), Anchor (+19.7%), and Potion Belt (+19.4%), with each lift shown.

Bag of Marbles+27.9%27 runsAnchor+19.7%30 runsPotion Belt+19.4%21 runsCentennial Puzzle+16.5%24 runsPantograph+16.4%16 runsRegal Pillow+16.1%21 runs

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

Secret Weapon Card Details

A 0-energy rare skill, Secret Weapon is upgraded 29.4% of the time and tends to enter the deck around floor 27.

Put an Attack from your Draw Pile into your Hand.

What Ends Runs with Secret Weapon

Runs holding Secret Weapon end most often against Aeonglass Boss (8.0%), Knowledge Demon Boss (4.0%), and Knights Elite (4.0%) — the share of its runs each accounts for is shown.

• Aeonglass Boss8.0% of runs
• Knowledge Demon Boss4.0% of runs
• Knights Elite4.0% of runs
• Kaiser Crab Boss4.0% of runs
• Queen Boss3.0% of runs

See Also

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