Sunder•Attack

Is Sunder good in Slay the Spire 2?

In Slay the Spire 2, Sunder is an uncommon attack from the Defect card pool. Its effect: Deal 24 damage. If this kills an enemy, gain Energy. The data flags it as a weaker pick, settling at D tier — usually one to pass on unless your deck specifically wants it.

Over 48 tracked runs its win rate sits at 26.8%, 7.9% ahead of the 18.9% all-deck baseline. It sees niche play, included in only 1.3% of eligible runs. Within Defect runs it’s drafted 8.2% 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 All for One, which lifts its win rate by +18.4% when the two share a deck. On the relic side, Bag of Marbles is its standout companion, worth a +21.4% win-rate swing alongside it. It costs 3 energy, gets upgraded 27.3% of the time, and tends to be picked up near floor 13.

Upgrading the card adds +8 Damage to its stat line. Of the runs that drafted it, 11 ended in victory against 30 deaths and 7 abandons. Its most common run-ender is Kaiser Crab Boss, finishing 8.3% of the runs it shows up in. See the synergies, class split, and threats below for the full picture of where Sunder fits a Defect deck.

Best Cards to Pair with Sunder

Sunder’s strongest card pairings so far are All for One (+18.4%), Production (+16.9%), and FTL (+15.8%), each shown with the win-rate lift it adds.

All for One+18.4%8 runsProduction+16.9%3 runsFTL+15.8%8 runsSkim+14.9%7 runsCreative AI+13.8%4 runsFlak Cannon+13.8%4 runs

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

Sunder Win Rate by Class

Exclusive to the Defect, Sunder posts a 26.8% win rate over 48 tracked runs.

The Defectappears in 8.2% of its runs (48 tracked)

Best Relics for Sunder

The relics that swing Sunder’s win rate the most are Bag of Marbles (+21.4%), Festive Popper (+20.9%), and Red Mask (+18.9%), with each lift shown.

Bag of Marbles+21.4%8 runsFestive Popper+20.9%7 runsRed Mask+18.9%10 runsCandelabra+17.7%5 runsSword of Jade+16.9%3 runsFragrant Mushroom+16.9%3 runs

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

Sunder Card Details

A 3-energy uncommon attack, Sunder is upgraded 27.3% of the time and tends to enter the deck around floor 13.

Deal 24 damage. If this kills an enemy, gain Energy.

Upgrade: +8 Damage

What Ends Runs with Sunder

Runs holding Sunder end most often against Kaiser Crab Boss (8.3%), Knowledge Demon Boss (6.3%), and Queen Boss (4.2%) — the share of its runs each accounts for is shown.

• Kaiser Crab Boss8.3% of runs
• Knowledge Demon Boss6.3% of runs
• Queen Boss4.2% of runs
• Lagavulin Matriarch Boss4.2% of runs
• Entomancer Elite4.2% of runs

See Also

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