Bouncing Flask Skill

Is Bouncing Flask good in Slay the Spire 2?

In Slay the Spire 2, Bouncing Flask is an uncommon skill from the Silent card pool. Its effect: Apply 3 Poison to a random enemy times. The data flags it as a weaker pick, settling at D tier — usually one to pass on unless your deck specifically wants it.

Over 552 tracked runs its win rate sits at 25.2%, 11.0% ahead of the 14.3% all-deck baseline. It sees niche play, included in only 2.0% of eligible runs. Offer data argues the other way: taken 21.9% of the time it is shown, runs that picked it win 25.3% against 29.8% for runs that passed — a -4.3% pick lift across 466 decided runs. Within Silent runs it’s drafted 9.4% 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 Flanking, which lifts its win rate by +28.6% when the two share a deck. On the relic side, Fragrant Mushroom is its standout companion, worth a +30.9% win-rate swing alongside it. It costs 2 energy, gets upgraded 39.0% of the time, and tends to be picked up near floor 14.

Upgrading the card adds +1 Repeat to its stat line. Of the runs that drafted it, 138 ended in victory against 409 deaths and 5 abandons. Its most common run-ender is Test Subject Boss, finishing 6.3% of the runs it shows up in. See the synergies, class split, and threats below for the full picture of where Bouncing Flask fits a Silent deck.

Pick or Skip: Bouncing Flask

Players take Bouncing Flask in 21.9% of the 2449 offers it appears in; those runs win 25.3% against 29.8% for runs that passed, a pick lift of -4.3% over 466 decided runs.

Taken 535 times out of 2449 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 Bouncing Flask

Of the 4 pickup windows recorded for Bouncing Flask, Act 3 is the best: 56.8% across 44 runs.

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

Best Cards to Pair with Bouncing Flask

Bouncing Flask’s strongest card pairings so far are Flanking (+28.6%), Tactician (+21.2%), and Sneaky (+21.1%), each shown with the win-rate lift it adds.

Flanking+28.6%17 runsTactician+21.2%88 runsSneaky+21.1%17 runsUp My Sleeve+18.4%37 runsAssassinate+17.9%78 runsHand Trick+17.3%44 runs

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

Bouncing Flask Win Rate by Class

Exclusive to the Silent, Bouncing Flask posts a 24.9% win rate over 546 tracked runs.

The Silentappears in 9.4% of its runs (546 tracked)

Best Relics for Bouncing Flask

The relics that swing Bouncing Flask’s win rate the most are Fragrant Mushroom (+30.9%), Razor Tooth (+30.2%), and Jeweled Mask (+27.7%), with each lift shown.

Fragrant Mushroom+30.9%23 runsRazor Tooth+30.2%27 runsJeweled Mask+27.7%25 runsCloak Clasp+27.5%27 runsNunchaku+26.9%37 runsSnecko Skull+24.8%59 runs

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

Bouncing Flask Card Details

A 2-energy uncommon skill, Bouncing Flask is upgraded 39.0% of the time and tends to enter the deck around floor 14.

Apply 3 Poison to a random enemy times.

Upgrade: +1 Repeat

What Ends Runs with Bouncing Flask

Runs holding Bouncing Flask end most often against Test Subject Boss (6.3%), Kaiser Crab Boss (5.4%), and Aeonglass Boss (4.7%) — the share of its runs each accounts for is shown.

• Test Subject Boss6.3% of runs
• Kaiser Crab Boss5.4% of runs
• Aeonglass Boss4.7% of runs
• Queen Boss3.4% of runs
• Slumbering Beetle Normal3.4% of runs

See Also

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