Radiate Attack

Is Radiate good in Slay the Spire 2?

Radiate is an uncommon Regent attack in Slay the Spire 2. In combat it resolves as: Deal 3 damage to ALL enemies for each Stars gained this turn. It currently underperforms most alternatives, sitting at D tier in our Slay the Spire 2 card rankings.

Across 515 recorded runs, decks running it win 25.4% of the time, comfortably clear of the 14.3% average, by 11.1%. It’s a more selective pick, turning up in just 1.9% of decks that could run it. Offer data is close to a wash — 22.6% of offers taken, 26.1% for runs that picked it against 27.7% for runs that skipped, a pick lift of just -1.5% over 402 decided runs. Regent players keep it in 11.0% 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 Decay — together they post a +32.1% swing in win rate. It also has strong chemistry with the relic Sword of Jade, which moves its win rate by +28.8%. At 0 energy, it’s upgraded in 27.4% of runs and usually joins the deck around floor 15.

Upgraded, it gains +1 Damage, which is why so many decks invest a rest-site upgrade in it. That’s 130 wins, 382 deaths, and 3 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Knowledge Demon Boss, which closes out 4.9% of its appearances. Read on for Radiate’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Regent run.

Pick or Skip: Radiate

Out of 1947 recorded offers Radiate is taken 22.6% of the time, and taking it is worth -1.5% in pick lift — 26.1% for runs that picked it against 27.7% for runs that skipped, across 402 decided runs.

Taken 439 times out of 1947 offers.

Pick rate when offered counts offers, not runs: out of every time the game put this in front of a player, how often it was taken. It is not the same number as the share of runs that end up containing it.

Pick lift is the sample-adjusted gap between runs that took the option and runs that passed on it. It is the fair way to rank choices, because raw win rates put the smallest samples on top.

When to Pick Up Radiate

Radiate is strongest when it joins the deck in Act 3, where runs win 65.5% across 55 runs — one of 4 recorded pickup windows.

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

Best Cards to Pair with Radiate

Ranked by win-rate lift, Radiate performs best alongside Decay (+32.1%), Bundle of Joy (+25.8%), and Prophesize (+24.7%).

Decay+32.1%24 runsBundle of Joy+25.8%36 runsProphesize+24.7%23 runsNeutron Aegis+22.6%38 runsManifest Authority+22.3%54 runsMad Science+22.1%29 runs

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

Radiate Win Rate by Class

Radiate is drafted only by the Regent, where it holds a 25.4% win rate across 514 runs.

The Regentappears in 11.0% of its runs (514 tracked)

Best Relics for Radiate

Radiate pairs best with the relics Sword of Jade (+28.8%), Fragrant Mushroom (+28.7%), and Gorget (+27.5%), ranked by win-rate lift.

Sword of Jade+28.8%15 runsFragrant Mushroom+28.7%28 runsGorget+27.5%79 runsPantograph+27.4%46 runsFencing Manual+27.1%52 runsPendulum+27.0%75 runs

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

Radiate Card Details

Radiate is an uncommon attack costing 0 energy; it’s upgraded in 27.4% of runs and usually picked up by floor 15.

Deal 3 damage to ALL enemies for each Stars gained this turn.

Upgrade: +1 Damage

What Ends Runs with Radiate

Radiate’s most common run-enders are Knowledge Demon Boss (4.9%), Test Subject Boss (4.7%), and The Insatiable Boss (4.5%).

• Knowledge Demon Boss4.9% of runs
• Test Subject Boss4.7% of runs
• The Insatiable Boss4.5% of runs
• Decimillipede Elite4.1% of runs
• Aeonglass Boss3.9% of runs

See Also

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