Undeath Skill

Is Undeath good in Slay the Spire 2?

In Slay the Spire 2, Undeath is a rare skill from the Necrobinder card pool. Its effect: Gain 7 Block. Add a copy of this card into your Discard Pile. Performance-wise it’s a solid if unspectacular include, rated C tier overall.

Over 359 tracked runs its win rate sits at 31.6%, 17.3% ahead of the 14.3% all-deck baseline. It sees niche play, included in only 1.3% of eligible runs. Offer data argues the other way: taken 33.1% of the time it is shown, runs that picked it win 31.1% against 38.2% for runs that passed — a -6.8% pick lift across 286 decided runs. Within Necrobinder runs it’s drafted 7.5% 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 Mad Science, which lifts its win rate by +26.8% when the two share a deck. On the relic side, Gorget is its standout companion, worth a +31.7% win-rate swing alongside it. It costs 0 energy, gets upgraded 29.7% of the time, and tends to be picked up near floor 17.

Upgrading the card adds +2 Block to its stat line. Of the runs that drafted it, 113 ended in victory against 245 deaths and 1 abandons. Its most common run-ender is Knowledge Demon Boss, finishing 8.1% of the runs it shows up in. See the synergies, class split, and threats below for the full picture of where Undeath fits a Necrobinder deck.

Pick or Skip: Undeath

Players take Undeath in 33.1% of the 907 offers it appears in; those runs win 31.1% against 38.2% for runs that passed, a pick lift of -6.8% over 286 decided runs.

Taken 300 times out of 907 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 Undeath

Of the 4 pickup windows recorded for Undeath, Act 3 is the best: 75.0% across 16 runs.

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

Best Cards to Pair with Undeath

Undeath’s strongest card pairings so far are Mad Science (+26.8%), Demesne (+23.2%), and Call of the Void (+18.7%), each shown with the win-rate lift it adds.

Mad Science+26.8%28 runsDemesne+23.2%67 runsCall of the Void+18.7%44 runsNeurosurge+16.9%46 runsOblivion+16.8%42 runsTransfigure+16.8%40 runs

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

Undeath Win Rate by Class

Exclusive to the Necrobinder, Undeath posts a 31.2% win rate over 347 tracked runs.

The Necrobinderappears in 7.5% of its runs (347 tracked)

Best Relics for Undeath

The relics that swing Undeath’s win rate the most are Gorget (+31.7%), Cloak Clasp (+26.1%), and Anchor (+25.6%), with each lift shown.

Gorget+31.7%63 runsCloak Clasp+26.1%18 runsAnchor+25.6%62 runsTuning Fork+25.3%36 runsPear+24.9%31 runsLetter Opener+24.3%35 runs

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

Undeath Card Details

A 0-energy rare skill, Undeath is upgraded 29.7% of the time and tends to enter the deck around floor 17.

Gain 7 Block. Add a copy of this card into your Discard Pile.

Upgrade: +2 Block

What Ends Runs with Undeath

Runs holding Undeath end most often against Knowledge Demon Boss (8.1%), Test Subject Boss (5.8%), and Aeonglass Boss (4.7%) — the share of its runs each accounts for is shown.

• Knowledge Demon Boss8.1% of runs
• Test Subject Boss5.8% of runs
• Aeonglass Boss4.7% of runs
• Decimillipede Elite4.5% of runs
• Infested Prisms Elite4.5% of runs

See Also

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