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 57 recorded runs, decks running it win 29.4% of the time, comfortably clear of the 18.9% average, by 10.5%. It’s a more selective pick, turning up in just 1.5% of decks that could run it. Silent players keep it in 5.8% 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 Tactician — together they post a +25.8% swing in win rate. It also has strong chemistry with the relic Gorget, which moves its win rate by +32.2%. At 1 energy, it’s upgraded in 40.6% of runs and usually joins the deck around floor 15.

That’s 15 wins, 36 deaths, and 6 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Knowledge Demon Boss, which closes out 8.8% 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.

Best Cards to Pair with Accelerant

Ranked by win-rate lift, Accelerant performs best alongside Tactician (+25.8%), Blur (+17.3%), and Flechettes (+16.9%).

Tactician+25.8%8 runsBlur+17.3%8 runsFlechettes+16.9%6 runsFlanking+16.9%5 runsDash+16.3%3 runsAcrobatics+15.3%10 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 29.4% win rate across 57 runs.

The Silentappears in 5.8% of its runs (57 tracked)

Best Relics for Accelerant

Accelerant pairs best with the relics Gorget (+32.2%), Centennial Puzzle (+28.2%), and Anchor (+26.9%), ranked by win-rate lift.

Gorget+32.2%12 runsCentennial Puzzle+28.2%9 runsAnchor+26.9%13 runsBlood Vial+25.3%10 runsFestive Popper+17.6%10 runsWhetstone+17.3%9 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 40.6% of runs and usually picked up by floor 15.

Poison is triggered additional times.

What Ends Runs with Accelerant

Accelerant’s most common run-enders are Knowledge Demon Boss (8.8%), Kaiser Crab Boss (7.0%), and Mytes Normal (3.5%).

• Knowledge Demon Boss8.8% of runs
• Kaiser Crab Boss7.0% of runs
• Mytes Normal3.5% of runs
• Decimillipede Elite3.5% of runs
• The Insatiable Boss3.5% of runs

See Also

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