Bolas Attack

Is Bolas good in Slay the Spire 2?

In Slay the Spire 2, Bolas is a rare attack from the Colorless card pool. Its effect: Deal 3 damage. At the start of your next turn, return this to your Hand. Performance-wise it’s a solid if unspectacular include, rated C tier overall.

Over 107 tracked runs its win rate sits at 41.9%, 28.1% ahead of the 13.8% all-deck baseline. It sees niche play, included in only 0.5% of eligible runs. When it is actually offered players take it 1.7% of the time, and that looks correct: those runs win 32.1% against 26.3% for runs that passed, a +4.3% pick lift over 28 decided runs. Within Silent runs it’s drafted 0.5% 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 Blade Dance, which lifts its win rate by +14.9% when the two share a deck. On the relic side, Regal Pillow is its standout companion, worth a +25.3% win-rate swing alongside it. It costs 0 energy, gets upgraded 24.6% of the time, and tends to be picked up near floor 22.

Upgrading the card adds +1 Damage to its stat line. Of the runs that drafted it, 44 ended in victory against 61 deaths and 2 abandons. Its most common run-ender is Knowledge Demon Boss, finishing 7.5% of the runs it shows up in. See the synergies, class split, and threats below for the full picture of where Bolas fits a Colorless deck.

Pick or Skip: Bolas

Players take Bolas in 1.7% of the 1608 offers it appears in; those runs win 32.1% against 26.3% for runs that passed, a pick lift of +4.3% over 28 decided runs.

Taken 28 times out of 1608 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 Bolas

Of the 3 pickup windows recorded for Bolas, Act 3 is the best: 72.0% across 26 runs.

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

Best Cards to Pair with Bolas

Bolas’s strongest card pairings so far are Blade Dance (+14.9%), Defend (+13.6%), and Survivor (+11.8%), each shown with the win-rate lift it adds.

Blade Dance+14.9%15 runsDefend+13.6%22 runsSurvivor+11.8%23 runsNeutralize+11.8%23 runsArmaments+8.8%18 runsStrike+8.7%21 runs

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

Bolas Win Rate by Class

Of the 5 classes that draft Bolas, it performs best with Silent (60.9%), Regent (47.4%), and Necrobinder (42.9%).

The Silent60.9%24 runsThe Regent47.4%20 runsThe Necrobinder42.9%14 runsThe Ironclad30.0%30 runsThe Defect27.8%18 runs

Best Relics for Bolas

The relics that swing Bolas’s win rate the most are Regal Pillow (+25.3%), Oddly Smooth Stone (+21.5%), and Happy Flower (+19.5%), with each lift shown.

Regal Pillow+25.3%24 runsOddly Smooth Stone+21.5%26 runsHappy Flower+19.5%19 runsRed Mask+19.5%19 runsStrawberry+19.3%24 runsGorget+18.6%26 runs

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

Bolas Card Details

A 0-energy rare attack, Bolas is upgraded 24.6% of the time and tends to enter the deck around floor 22.

Deal 3 damage. At the start of your next turn, return this to your Hand.

Upgrade: +1 Damage

What Ends Runs with Bolas

Runs holding Bolas end most often against Knowledge Demon Boss (7.5%), Queen Boss (7.5%), and Kaiser Crab Boss (5.6%) — the share of its runs each accounts for is shown.

• Knowledge Demon Boss7.5% of runs
• Queen Boss7.5% of runs
• Kaiser Crab Boss5.6% of runs
• Test Subject Boss4.7% of runs
• The Insatiable Boss2.8% of runs

See Also

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