Bone FluteRelic
Whenever Osty attacks, gain Block.
Is Bone Flute good in Slay the Spire 2?
In Slay the Spire 2, Bone Flute is a common relic you can pick up on your climb. Its effect: Whenever Osty attacks, gain Block. Performance-wise it’s a steady, unspectacular pick rated C tier overall.
Over 38 tracked runs the win rate of decks holding it sits at 45.7%, 26.8% ahead of the 18.9% all-run baseline. It sees lighter play, carried in only 1.0% of runs. It does its best work in the hands of the Necrobinder, who post a 45.7% win rate with it. Within Necrobinder runs specifically, it’s carried 4.6% of the time.
Its standout card pairing is Rattle, which lifts the relic’s win rate by +54.3% when both are in play. It also works nicely with Fasten, good for a +54.3% win-rate change. It typically enters the deck near floor 21. As a common relic, how often it’s offered depends on its rarity tier.
Of the runs that carried it, 16 ended in victory while 19 fell to a defeat. Its most common run-ender is Bygone Effigy Elite, finishing 7.9% of the runs it appears in. See the best cards, class split, and threats below for the full read on whether Bone Flute is worth grabbing.
Bone Flute Win Rate & Pick Rate
At a 45.7% win rate, Bone Flute runs 26.8% ahead of the 18.9% all-run baseline — the bars below put the two side by side.
Run Outcomes with Bone Flute
Across the 38 runs that carried Bone Flute, 16 ended in a win and 22 in a loss — a 42.1% win share, counting abandons as losses.
- Wins 42.1%
- Losses 57.9%
Bone Flute Win Rate by Class
Bone Flute’s class data comes mostly from the Necrobinder, at a 45.7% win rate over 38 runs.
The Necrobinderappears in 4.6% of its runs (38 tracked)Bone Flute Details
Carried in 1.0% of runs, Bone Flute is a common relic typically acquired near floor 21.
Whenever Osty attacks, gain Block.
What Ends Runs with Bone Flute
Runs carrying Bone Flute end most often against Bygone Effigy Elite (7.9%), Fabricator Normal (5.3%), and Aeonglass Boss (5.3%) — the share of its runs each accounts for is shown.
- Bygone Effigy Elite7.9% of runs
- Fabricator Normal5.3% of runs
- Aeonglass Boss5.3% of runs
- Queen Boss5.3% of runs
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Bone Flute – Frequently Asked Questions
Is Bone Flute good in Slay the Spire 2?
Across 38 tracked runs carrying it, Bone Flute wins 45.7% of the time — +26.8% above the average run. Win rate reflects how often runs with the relic end in victory.
What does Bone Flute do in Slay the Spire 2?
Whenever Osty attacks, gain Block.
How rare is Bone Flute in Slay the Spire 2?
Bone Flute is a Common relic, picked up in 1.0% of tracked runs.
What is the best card to use with Bone Flute?
In tracked runs, Bone Flute has performed best alongside Rattle, which lifts its win rate by +54.3% over 5 runs together.
See Also
Keep exploring Slay the Spire 2 tier lists and stats below.