Protector•Attack

Is Protector good in Slay the Spire 2?

Protector is an ancient Necrobinder attack in Slay the Spire 2. In combat it resolves as: Osty deals 10 damage. Deals additional damage equal to Osty's Max HP. It’s a dependable, middle-of-the-pack option, landing at C tier in our rankings.

Across 50 recorded runs, decks running it win 26.0% of the time, comfortably clear of the 13.9% average, by 12.1%. It’s a more selective pick, turning up in just 0.4% of decks that could run it. Necrobinder players keep it in 2.3% of their runs, so it’s a familiar sight in those decks. On average it shows up 1.0 times in the decks that take it.

It performs best next to Friendship — together they post a +14.8% swing in win rate. It also has strong chemistry with the relic Archaic Tooth, which moves its win rate by -2.5%. At 1 energy, it’s upgraded in 30.8% of runs and usually joins the deck around floor 18.

Upgraded, it gains +5 CalculationBase, -1 EnergyCost, which is why so many decks invest a rest-site upgrade in it. That’s 13 wins, 37 deaths, and 0 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Decimillipede Elite, which closes out 8.0% of its appearances. Read on for Protector’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Necrobinder run.

When to Pick Up Protector

Protector is strongest when it joins the deck in Act 2, where runs win 21.3% across 47 runs — one of 1 recorded pickup windows.

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

Best Cards to Pair with Protector

Ranked by win-rate lift, Protector performs best alongside Friendship (+14.8%), Spur (+8.4%), and Wisp (+8.1%).

Friendship+14.8%16 runsSpur+8.4%15 runsWisp+8.1%24 runsGrave Warden+1.9%28 runsInvoke+0.9%22 runsDefy+0.2%19 runs

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

Protector Win Rate by Class

Protector is drafted only by the Necrobinder, where it holds a 26.0% win rate across 50 runs.

The Necrobinderappears in 2.3% of its runs (50 tracked)

Best Relics for Protector

Protector pairs best with the relics Archaic Tooth (-2.5%) and Bound Phylactery (-2.5%), ranked by win-rate lift.

Archaic Tooth-2.5%48 runsBound Phylactery-2.5%48 runs

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

Protector Card Details

Protector is an ancient attack costing 1 energy; it’s upgraded in 30.8% of runs and usually picked up by floor 18.

Osty deals 10 damage. Deals additional damage equal to Osty's Max HP.

Upgrade: +5 CalculationBase, -1 EnergyCost

What Ends Runs with Protector

Protector’s most common run-enders are Decimillipede Elite (8.0%), Mytes Normal (6.0%), and The Insatiable Boss (6.0%).

• Decimillipede Elite8.0% of runs
• Mytes Normal6.0% of runs
• The Insatiable Boss6.0% of runs
• Aeonglass Boss6.0% of runs
• Soul Nexus Elite6.0% of runs

See Also

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