Forbidden Grimoire•Power

Is Forbidden Grimoire good in Slay the Spire 2?

Forbidden Grimoire is an ancient Necrobinder power in Slay the Spire 2. In combat it resolves as: At the end of combat, you may remove a card from your Deck. It currently underperforms most alternatives, sitting at D tier in our Slay the Spire 2 card rankings.

Across 22 recorded runs, decks running it win 22.7% of the time, comfortably clear of the 14.0% average, by 8.8%. It’s a more selective pick, turning up in just 0.2% of decks that could run it. Necrobinder players keep it in 1.0% 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 Defend — together they post a +2.4% swing in win rate. It also has strong chemistry with the relic Bound Phylactery, which moves its win rate by 0.0%. At 2 energy, it’s upgraded in 100.0% of runs and usually joins the deck around floor 22.

Upgraded, it gains -1 EnergyCost, which is why so many decks invest a rest-site upgrade in it. That’s 5 wins, 17 deaths, and 0 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Spiny Toad Normal, which closes out 9.1% of its appearances. Read on for Forbidden Grimoire’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Necrobinder run.

When to Pick Up Forbidden Grimoire

Forbidden Grimoire is strongest when it joins the deck in Act 2, where runs win 6.3% across 16 runs — one of 2 recorded pickup windows.

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

Best Cards to Pair with Forbidden Grimoire

Ranked by win-rate lift, Forbidden Grimoire performs best alongside Defend (+2.4%), Unleash (-0.3%), and Bodyguard (-5.6%).

Defend+2.4%15 runsUnleash-0.3%18 runsBodyguard-5.6%15 runs

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

Forbidden Grimoire Win Rate by Class

Forbidden Grimoire is drafted only by the Necrobinder, where it holds a 22.7% win rate across 22 runs.

The Necrobinderappears in 1.0% of its runs (22 tracked)

Best Relics for Forbidden Grimoire

Forbidden Grimoire pairs best with the relics Bound Phylactery (0.0%) and Dusty Tome (0.0%), ranked by win-rate lift.

Bound Phylactery0.0%22 runsDusty Tome0.0%22 runs

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

Forbidden Grimoire Card Details

Forbidden Grimoire is an ancient power costing 2 energy; it’s upgraded in 100.0% of runs and usually picked up by floor 22.

At the end of combat, you may remove a card from your Deck.

Upgrade: -1 EnergyCost

What Ends Runs with Forbidden Grimoire

Forbidden Grimoire’s most common run-enders are Spiny Toad Normal (9.1%), The Obscura Normal (9.1%), and Decimillipede Elite (9.1%).

• Spiny Toad Normal9.1% of runs
• The Obscura Normal9.1% of runs
• Decimillipede Elite9.1% of runs
• Kaiser Crab Boss9.1% of runs

See Also

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