Ball Lightning•Attack

Is Ball Lightning good in Slay the Spire 2?

Ball Lightning is a common Defect attack in Slay the Spire 2. In combat it resolves as: Deal 7 damage. Channel 1 Lightning. It currently underperforms most alternatives, sitting at F tier in our Slay the Spire 2 card rankings.

Across 157 recorded runs, decks running it win 19.7% of the time, right in line with the typical deck. It’s a more selective pick, turning up in just 4.2% of decks that could run it. Defect players keep it in 26.9% of their runs, so it’s a familiar sight in those decks. On average it shows up 1.2 times in the decks that take it.

It performs best next to Fasten — together they post a +20.1% swing in win rate. It also has strong chemistry with the relic Data Disk, which moves its win rate by +23.0%. At 1 energy, it’s upgraded in 17.4% of runs and usually joins the deck around floor 11.

Upgraded, it gains +3 Damage, which is why so many decks invest a rest-site upgrade in it. That’s 28 wins, 114 deaths, and 15 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Queen Boss, which closes out 9.6% of its appearances. Read on for Ball Lightning’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Defect run.

Best Cards to Pair with Ball Lightning

Ranked by win-rate lift, Ball Lightning performs best alongside Fasten (+20.1%), Energy Surge (+17.0%), and Machine Learning (+16.2%).

Fasten+20.1%5 runsEnergy Surge+17.0%9 runsMachine Learning+16.2%16 runsProduction+15.8%4 runsProlong+15.8%5 runsThunder+13.6%37 runs

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

Ball Lightning Win Rate by Class

Ball Lightning is drafted only by the Defect, where it holds a 19.7% win rate across 157 runs.

The Defectappears in 26.9% of its runs (157 tracked)

Best Relics for Ball Lightning

Ball Lightning pairs best with the relics Data Disk (+23.0%), Blood Vial (+21.6%), and Joss Paper (+21.3%), ranked by win-rate lift.

Data Disk+23.0%12 runsBlood Vial+21.6%20 runsJoss Paper+21.3%8 runsSignet Ring+18.5%4 runsLantern+18.2%13 runsMembership Card+17.6%6 runs

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

Ball Lightning Card Details

Ball Lightning is a common attack costing 1 energy; it’s upgraded in 17.4% of runs and usually picked up by floor 11.

Deal 7 damage. Channel 1 Lightning.

Upgrade: +3 Damage

What Ends Runs with Ball Lightning

Ball Lightning’s most common run-enders are Queen Boss (9.6%), Kaiser Crab Boss (5.7%), and Knowledge Demon Boss (5.1%).

• Queen Boss9.6% of runs
• Kaiser Crab Boss5.7% of runs
• Knowledge Demon Boss5.1% of runs
• Decimillipede Elite4.5% of runs
• Entomancer Elite4.5% of runs

See Also

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