Spur•Skill

Is Spur good in Slay the Spire 2?

Spur is an uncommon Necrobinder skill in Slay the Spire 2. In combat it resolves as: Summon 3. Osty heals 5 HP. It’s a dependable, middle-of-the-pack option, landing at C tier in our rankings.

Across 250 recorded runs, decks running it win 24.9% of the time, comfortably clear of the 14.1% average, by 10.8%. It’s a more selective pick, turning up in just 2.4% of decks that could run it. Offer data is close to a wash — 31.0% of offers taken, 25.6% for runs that picked it against 27.0% for runs that skipped, a pick lift of just -1.3% over 215 decided runs. Necrobinder players keep it in 12.9% 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 Mad Science — together they post a +23.3% swing in win rate. It also has strong chemistry with the relic Bone Flute, which moves its win rate by +23.8%. At 1 energy, it’s upgraded in 35.0% of runs and usually joins the deck around floor 15.

Upgraded, it gains +2 Summon, +2 Heal, which is why so many decks invest a rest-site upgrade in it. That’s 62 wins, 187 deaths, and 1 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Infested Prisms Elite, which closes out 4.8% of its appearances. Read on for Spur’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Necrobinder run.

Pick or Skip: Spur

Out of 755 recorded offers Spur is taken 31.0% of the time, and taking it is worth -1.3% in pick lift — 25.6% for runs that picked it against 27.0% for runs that skipped, across 215 decided runs.

Taken 234 times out of 755 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 Spur

Spur is strongest when it joins the deck in Act 3, where runs win 67.7% across 31 runs — one of 3 recorded pickup windows.

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

Best Cards to Pair with Spur

Ranked by win-rate lift, Spur performs best alongside Mad Science (+23.3%), Reanimate (+20.1%), and Debilitate (+18.5%).

Mad Science+23.3%18 runsReanimate+20.1%41 runsDebilitate+18.5%28 runsThe Scythe+17.7%17 runsNeurosurge+16.7%32 runsParse+16.3%30 runs

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

Spur Win Rate by Class

Spur is drafted only by the Necrobinder, where it holds a 24.9% win rate across 250 runs.

The Necrobinderappears in 12.9% of its runs (250 tracked)

Best Relics for Spur

Spur pairs best with the relics Bone Flute (+23.8%), Happy Flower (+22.4%), and Whetstone (+22.1%), ranked by win-rate lift.

Bone Flute+23.8%28 runsHappy Flower+22.4%46 runsWhetstone+22.1%40 runsPotion Belt+21.6%47 runsBag of Preparation+20.7%25 runsVajra+19.6%37 runs

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

Spur Card Details

Spur is an uncommon skill costing 1 energy; it’s upgraded in 35.0% of runs and usually picked up by floor 15.

Summon 3. Osty heals 5 HP.

Upgrade: +2 Summon, +2 Heal

What Ends Runs with Spur

Spur’s most common run-enders are Infested Prisms Elite (4.8%), Knowledge Demon Boss (4.0%), and Aeonglass Boss (4.0%).

• Infested Prisms Elite4.8% of runs
• Knowledge Demon Boss4.0% of runs
• Aeonglass Boss4.0% of runs
• Queen Boss4.0% of runs
• The Insatiable Boss3.6% of runs

See Also

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