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 currently underperforms most alternatives, sitting at D tier in our Slay the Spire 2 card rankings.

Across 13 recorded runs, decks running it win 25.0% of the time, comfortably clear of the 18.9% average, by 6.0%. It’s a more selective pick, turning up in just 0.3% of decks that could run it. Necrobinder players keep it in 1.6% 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 Reave — together they post a +17.3% swing in win rate. It also has strong chemistry with the relic Strawberry, which moves its win rate by +9.6%. 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 3 wins, 9 deaths, and 1 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Decimillipede Elite, which closes out 15.4% 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.

Best Cards to Pair with Protector

Ranked by win-rate lift, Protector performs best alongside Reave (+17.3%), Haunt (+11.7%), and Friendship (+11.7%).

Reave+17.3%3 runsHaunt+11.7%5 runsFriendship+11.7%5 runsBorrowed Time+9.6%3 runsSeverance+9.6%3 runsDirge+7.1%4 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 25.0% win rate across 13 runs.

The Necrobinderappears in 1.6% of its runs (13 tracked)

Best Relics for Protector

Protector pairs best with the relics Strawberry (+9.6%), Pantograph (+1.9%), and Pendulum (+1.9%), ranked by win-rate lift.

Strawberry+9.6%3 runsPantograph+1.9%3 runsPendulum+1.9%3 runsArchaic Tooth0.0%13 runsBound Phylactery0.0%13 runsSword of Stone-5.8%3 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 (15.4%).

• Decimillipede Elite15.4% of runs

See Also

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