Spirit of Ash Power

Is Spirit of Ash good in Slay the Spire 2?

Spirit of Ash is a rare Necrobinder power in Slay the Spire 2. In combat it resolves as: Whenever you play an Ethereal card, gain Block. It’s a dependable, middle-of-the-pack option, landing at C tier in our rankings.

Across 124 recorded runs, decks running it win 32.0% of the time, comfortably clear of the 12.9% average, by 19.1%. It’s a more selective pick, turning up in just 0.8% of decks that could run it. Offer data backs the pick — taken 20.9% of the time it is shown, with 32.2% for runs that took it against 26.7% for runs that did not, a +5.0% pick lift across 90 decided runs. Necrobinder players keep it in 4.9% 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 Demesne — together they post a +20.1% swing in win rate. It also has strong chemistry with the relic Bag of Preparation, which moves its win rate by +24.5%. At 1 energy, it’s upgraded in 30.5% of runs and usually joins the deck around floor 17.

That’s 39 wins, 83 deaths, and 2 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Aeonglass Boss, which closes out 8.1% of its appearances. Read on for Spirit of Ash’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Necrobinder run.

Pick or Skip: Spirit of Ash

Out of 459 recorded offers Spirit of Ash is taken 20.9% of the time, and taking it is worth +5.0% in pick lift — 32.2% for runs that picked it against 26.7% for runs that skipped, across 90 decided runs.

Taken 96 times out of 459 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 Spirit of Ash

Spirit of Ash is strongest when it joins the deck in Act 3, where runs win 61.5% across 13 runs — one of 3 recorded pickup windows.

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

Best Cards to Pair with Spirit of Ash

Ranked by win-rate lift, Spirit of Ash performs best alongside Demesne (+20.1%), Pull from Below (+20.0%), and Seance (+18.7%).

Demesne+20.1%23 runsPull from Below+20.0%25 runsSeance+18.7%18 runsPagestorm+18.6%28 runsSleight of Flesh+15.5%22 runsDefy+14.6%73 runs

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

Spirit of Ash Win Rate by Class

Spirit of Ash is drafted only by the Necrobinder, where it holds a 31.4% win rate across 123 runs.

The Necrobinderappears in 4.9% of its runs (123 tracked)

Best Relics for Spirit of Ash

Spirit of Ash pairs best with the relics Bag of Preparation (+24.5%), Blood Vial (+20.6%), and Whetstone (+18.8%), ranked by win-rate lift.

Bag of Preparation+24.5%25 runsBlood Vial+20.6%17 runsWhetstone+18.8%16 runsVenerable Tea Set+18.7%21 runsPotion Belt+18.6%25 runsLetter Opener+16.9%17 runs

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

Spirit of Ash Card Details

Spirit of Ash is a rare power costing 1 energy; it’s upgraded in 30.5% of runs and usually picked up by floor 17.

Whenever you play an Ethereal card, gain Block.

What Ends Runs with Spirit of Ash

Spirit of Ash’s most common run-enders are Aeonglass Boss (8.1%), Test Subject Boss (6.5%), and Knowledge Demon Boss (6.5%).

• Aeonglass Boss8.1% of runs
• Test Subject Boss6.5% of runs
• Knowledge Demon Boss6.5% of runs
• Decimillipede Elite4.8% of runs
• Infested Prisms Elite3.2% of runs

See Also

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