Quadcast Skill

Is Quadcast good in Slay the Spire 2?

Quadcast is an ancient Defect skill in Slay the Spire 2. In combat it resolves as: Evoke your rightmost Orb times. It currently underperforms most alternatives, sitting at D tier in our Slay the Spire 2 card rankings.

Across 124 recorded runs, decks running it win 13.0% of the time, right in line with the typical deck. It’s a more selective pick, turning up in just 0.6% of decks that could run it. Defect players keep it in 2.7% of their runs, so it’s a familiar sight in those decks. On average it shows up 1.0 times in the decks that take it.

It performs best next to Reboot — together they post a +17.0% swing in win rate. It also has strong chemistry with the relic Bronze Scales, which moves its win rate by +18.9%. At 1 energy, it’s upgraded in 55.1% of runs and usually joins the deck around floor 18.

Upgraded, it gains -1 EnergyCost, which is why so many decks invest a rest-site upgrade in it. That’s 16 wins, 107 deaths, and 1 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Knowledge Demon Boss, which closes out 10.5% of its appearances. Read on for Quadcast’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Defect run.

When to Pick Up Quadcast

Quadcast is strongest when it joins the deck in Act 2, where runs win 13.1% across 123 runs — one of 1 recorded pickup windows.

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

Best Cards to Pair with Quadcast

Ranked by win-rate lift, Quadcast performs best alongside Reboot (+17.0%), Storm (+11.3%), and Loop (+8.6%).

Reboot+17.0%21 runsStorm+11.3%20 runsLoop+8.6%33 runsBulk Up+7.4%16 runsNull+7.4%16 runsModded+7.3%21 runs

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

Quadcast Win Rate by Class

Quadcast is drafted only by the Defect, where it holds a 13.0% win rate across 124 runs.

The Defectappears in 2.7% of its runs (124 tracked)

Best Relics for Quadcast

Quadcast pairs best with the relics Bronze Scales (+18.9%), Bag of Marbles (+15.6%), and Red Mask (+14.7%), ranked by win-rate lift.

Bronze Scales+18.9%16 runsBag of Marbles+15.6%19 runsRed Mask+14.7%21 runsAnchor+11.3%20 runsFestive Popper+11.2%16 runsGorget+10.7%25 runs

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

Quadcast Card Details

Quadcast is an ancient skill costing 1 energy; it’s upgraded in 55.1% of runs and usually picked up by floor 18.

Evoke your rightmost Orb times.

Upgrade: -1 EnergyCost

What Ends Runs with Quadcast

Quadcast’s most common run-enders are Knowledge Demon Boss (10.5%), Infested Prisms Elite (8.9%), and The Insatiable Boss (8.1%).

• Knowledge Demon Boss10.5% of runs
• Infested Prisms Elite8.9% of runs
• The Insatiable Boss8.1% of runs
• Kaiser Crab Boss8.1% of runs
• Queen Boss7.3% of runs

See Also

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