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. Right now it’s a premium pick that sits at B tier — one of the better cards you can add to a deck this run.

Over 11 tracked runs its win rate sits at 33.3%, 20.7% ahead of the 12.6% all-deck baseline. It sees niche play, included in only 2.1% of eligible runs. Within Silent runs it’s drafted 10.6% 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 Ascender's Bane, which lifts its win rate by +33.3% when the two share a deck. On the relic side, Red Mask is its standout companion, worth a +66.7% win-rate swing alongside it. It costs 2 energy, gets upgraded 25.0% 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, 3 ended in victory against 6 deaths and 2 abandons. Its most common run-ender is Knowledge Demon Boss, finishing 18.2% 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.

Best Cards to Pair with Bouncing Flask

Bouncing Flask’s strongest card pairings so far are Ascender's Bane (+33.3%), Ricochet (+16.7%), and Snakebite (+16.7%), each shown with the win-rate lift it adds.

Ascender's Bane+33.3%4 runsRicochet+16.7%3 runsSnakebite+16.7%4 runsPoisoned Stab+16.7%4 runsPrepared+6.7%5 runsDefend+4.2%10 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 33.3% win rate over 11 tracked runs.

The Silentappears in 10.6% of its runs (11 tracked)

Best Relics for Bouncing Flask

The relics that swing Bouncing Flask’s win rate the most are Red Mask (+66.7%), Neow's Bones (+16.7%), and Pendulum (+16.7%), with each lift shown.

Red Mask+66.7%3 runsNeow's Bones+16.7%4 runsPendulum+16.7%4 runsRing of the Snake+4.2%10 runsNutritious Oyster0.0%3 runsBag of Marbles0.0%4 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 25.0% 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 Knowledge Demon Boss (18.2%) — the share of its runs each accounts for is shown.

• Knowledge Demon Boss18.2% of runs

See Also

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