Rattle•Attack

Is Rattle good in Slay the Spire 2?

Rattle is an uncommon Necrobinder attack in Slay the Spire 2. In combat it resolves as: Osty deals 7 damage. Hits an additional time for each other time he has attacked this turn. It currently underperforms most alternatives, sitting at D tier in our Slay the Spire 2 card rankings.

Across 17 recorded runs, decks running it win 0.0% of the time, trailing the 12.6% average by 12.6%. It’s a more selective pick, turning up in just 3.3% of decks that could run it. Necrobinder players keep it in 9.9% of their runs, so it’s a familiar sight in those decks. On average it shows up 1.1 times in the decks that take it.

It performs best next to Ascender's Bane — together they post a 0.0% swing in win rate. It also has strong chemistry with the relic Large Capsule, which moves its win rate by 0.0%. At 1 energy, it’s upgraded in 38.9% of runs and usually joins the deck around floor 7.

Upgraded, it gains +2 OstyDamage, which is why so many decks invest a rest-site upgrade in it. That’s 0 wins, 14 deaths, and 3 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Bygone Effigy Elite, which closes out 11.8% of its appearances. Read on for Rattle’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Necrobinder run.

Best Cards to Pair with Rattle

Ranked by win-rate lift, Rattle performs best alongside Ascender's Bane (0.0%), Bodyguard (0.0%), and Calcify (0.0%).

Ascender's Bane0.0%13 runsBodyguard0.0%17 runsCalcify0.0%5 runsCapture Spirit0.0%3 runsCleanse0.0%4 runsAfterlife0.0%3 runs

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

Rattle Win Rate by Class

Rattle is drafted only by the Necrobinder, where it holds a 0.0% win rate across 17 runs.

The Necrobinderappears in 9.9% of its runs (17 tracked)

Best Relics for Rattle

Rattle pairs best with the relics Large Capsule (0.0%), Pantograph (0.0%), and Bound Phylactery (0.0%), ranked by win-rate lift.

Large Capsule0.0%5 runsPantograph0.0%3 runsBound Phylactery0.0%16 runsBag of Preparation0.0%3 runsRegal Pillow0.0%3 runsVambrace0.0%3 runs

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

Rattle Card Details

Rattle is an uncommon attack costing 1 energy; it’s upgraded in 38.9% of runs and usually picked up by floor 7.

Osty deals 7 damage. Hits an additional time for each other time he has attacked this turn.

Upgrade: +2 OstyDamage

What Ends Runs with Rattle

Rattle’s most common run-enders are Bygone Effigy Elite (11.8%) and Test Subject Boss (11.8%).

• Bygone Effigy Elite11.8% of runs
• Test Subject Boss11.8% of runs

See Also

Compare Rattle with the rest of the best Slay the Spire 2 cards, relics, and classes below.