Unrelenting Attack

Is Unrelenting good in Slay the Spire 2?

In Slay the Spire 2, Unrelenting is an uncommon attack from the Ironclad card pool. Its effect: Deal 12 damage. The next Attack you play costs 0 -cost. The data flags it as a weaker pick, settling at D tier — usually one to pass on unless your deck specifically wants it.

Over 487 tracked runs its win rate sits at 19.4%, 5.6% ahead of the 13.8% all-deck baseline. It sees niche play, included in only 2.3% of eligible runs. Offer data argues the other way: taken 24.3% of the time it is shown, runs that picked it win 19.2% against 24.8% for runs that passed — a -5.5% pick lift across 417 decided runs. Within Ironclad runs it’s drafted 10.3% of the time, making it a regular part of that class’s decks. Decks that include it run about 1.1 copies on average.

Its standout pairing so far is Rupture, which lifts its win rate by +21.0% when the two share a deck. On the relic side, Pocketwatch is its standout companion, worth a +32.0% win-rate swing alongside it. It costs 2 energy, gets upgraded 34.7% of the time, and tends to be picked up near floor 14.

Upgrading the card adds +6 Damage to its stat line. Of the runs that drafted it, 93 ended in victory against 386 deaths and 8 abandons. Its most common run-ender is Kaiser Crab Boss, finishing 7.8% of the runs it shows up in. See the synergies, class split, and threats below for the full picture of where Unrelenting fits a Ironclad deck.

Pick or Skip: Unrelenting

Players take Unrelenting in 24.3% of the 1903 offers it appears in; those runs win 19.2% against 24.8% for runs that passed, a pick lift of -5.5% over 417 decided runs.

Taken 463 times out of 1903 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 Unrelenting

Of the 4 pickup windows recorded for Unrelenting, Act 3 is the best: 54.0% across 37 runs.

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

Best Cards to Pair with Unrelenting

Unrelenting’s strongest card pairings so far are Rupture (+21.0%), Barricade (+18.2%), and Crimson Mantle (+16.9%), each shown with the win-rate lift it adds.

Rupture+21.0%66 runsBarricade+18.2%36 runsCrimson Mantle+16.9%56 runsHellraiser+16.7%48 runsNot Yet+16.2%46 runsOffering+16.0%52 runs

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

Unrelenting Win Rate by Class

Exclusive to the Ironclad, Unrelenting posts a 19.7% win rate over 476 tracked runs.

The Ironcladappears in 10.3% of its runs (476 tracked)

Best Relics for Unrelenting

The relics that swing Unrelenting’s win rate the most are Pocketwatch (+32.0%), Bellows (+28.5%), and Gremlin Horn (+28.2%), with each lift shown.

Pocketwatch+32.0%22 runsBellows+28.5%17 runsGremlin Horn+28.2%35 runsVambrace+25.6%42 runsPrayer Wheel+24.4%15 runsUnsettling Lamp+21.0%27 runs

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

Unrelenting Card Details

A 2-energy uncommon attack, Unrelenting is upgraded 34.7% of the time and tends to enter the deck around floor 14.

Deal 12 damage. The next Attack you play costs 0 -cost.

Upgrade: +6 Damage

What Ends Runs with Unrelenting

Runs holding Unrelenting end most often against Kaiser Crab Boss (7.8%), Queen Boss (7.0%), and Test Subject Boss (6.6%) — the share of its runs each accounts for is shown.

• Kaiser Crab Boss7.8% of runs
• Queen Boss7.0% of runs
• Test Subject Boss6.6% of runs
• The Insatiable Boss4.9% of runs
• Knowledge Demon Boss4.9% of runs

See Also

Keep exploring Slay the Spire 2 tier lists and stats below.