Accelerant Power

Is Accelerant good in Slay the Spire 2?

Accelerant is a rare Silent power in Slay the Spire 2. In combat it resolves as: Poison is triggered additional times. It’s a dependable, middle-of-the-pack option, landing at C tier in our rankings.

Across 529 recorded runs, decks running it win 32.0% of the time, comfortably clear of the 14.3% average, by 17.7%. It’s a more selective pick, turning up in just 2.0% of decks that could run it. Offer data is close to a wash — 30.3% of offers taken, 35.0% for runs that picked it against 37.0% for runs that skipped, a pick lift of just -1.9% over 391 decided runs. Silent players keep it in 9.0% 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 Mad Science — together they post a +28.0% swing in win rate. It also has strong chemistry with the relic Lizard Tail, which moves its win rate by +30.7%. At 1 energy, it’s upgraded in 50.4% of runs and usually joins the deck around floor 16.

That’s 168 wins, 357 deaths, and 4 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Aeonglass Boss, which closes out 5.1% of its appearances. Read on for Accelerant’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Silent run.

Pick or Skip: Accelerant

Out of 1451 recorded offers Accelerant is taken 30.3% of the time, and taking it is worth -1.9% in pick lift — 35.0% for runs that picked it against 37.0% for runs that skipped, across 391 decided runs.

Taken 439 times out of 1451 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 Accelerant

Accelerant is strongest when it joins the deck in Act 3, where runs win 60.0% across 36 runs — one of 4 recorded pickup windows.

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

Best Cards to Pair with Accelerant

Ranked by win-rate lift, Accelerant performs best alongside Mad Science (+28.0%), Flanking (+26.2%), and Apotheosis (+24.8%).

Mad Science+28.0%42 runsFlanking+26.2%23 runsApotheosis+24.8%15 runsDebt+22.3%18 runsAssassinate+22.0%72 runsBullet Time+21.9%60 runs

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

Accelerant Win Rate by Class

Accelerant is drafted only by the Silent, where it holds a 32.0% win rate across 529 runs.

The Silentappears in 9.0% of its runs (529 tracked)

Best Relics for Accelerant

Accelerant pairs best with the relics Lizard Tail (+30.7%), Sai (+26.7%), and Paper Krane (+25.9%), ranked by win-rate lift.

Lizard Tail+30.7%36 runsSai+26.7%21 runsPaper Krane+25.9%19 runsWar Paint+25.4%89 runsJewelry Box+24.8%15 runsMiniature Tent+24.5%24 runs

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

Accelerant Card Details

Accelerant is a rare power costing 1 energy; it’s upgraded in 50.4% of runs and usually picked up by floor 16.

Poison is triggered additional times.

What Ends Runs with Accelerant

Accelerant’s most common run-enders are Aeonglass Boss (5.1%), Test Subject Boss (4.7%), and Kaiser Crab Boss (4.3%).

• Aeonglass Boss5.1% of runs
• Test Subject Boss4.7% of runs
• Kaiser Crab Boss4.3% of runs
• Decimillipede Elite4.2% of runs
• Knowledge Demon Boss4.0% of runs

See Also

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