Undying Sigil•Relic

Is Undying Sigil good in Slay the Spire 2?

In Slay the Spire 2, Undying Sigil is a shop relic you can pick up on your climb. Its effect: Enemies with at least as much Doom as HP deal 50% less damage. The data marks it as a weaker relic, settling at D tier — rarely a run-defining grab.

Over 12 tracked runs the win rate of decks holding it sits at 33.3%, 14.4% ahead of the 18.9% all-run baseline. It sees lighter play, carried in only 0.3% of runs. It does its best work in the hands of the Necrobinder, who post a 33.3% win rate with it. Within Necrobinder runs specifically, it’s carried 1.4% of the time.

Its standout card pairing is Death's Door, which lifts the relic’s win rate by +33.3% when both are in play. It also works nicely with Shroud, good for a +33.3% win-rate change. It typically enters the deck near floor 23. As a shop relic, how often it’s offered depends on its rarity tier.

Of the runs that carried it, 4 ended in victory while 8 fell to a defeat. Its most common run-ender is Knowledge Demon Boss, finishing 16.7% of the runs it appears in. See the best cards, class split, and threats below for the full read on whether Undying Sigil is worth grabbing.

Best Cards with Undying Sigil

The cards that gain the most from carrying Undying Sigil are Death's Door (+33.3%), Shroud (+33.3%), and Call of the Void (+33.3%), each shown with its win-rate swing.

Death's Door+33.3%6 runsShroud+33.3%3 runsCall of the Void+33.3%3 runsAscender's Bane+33.3%3 runsSleight of Flesh+33.3%3 runsCountdown+26.7%5 runs

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

Undying Sigil Win Rate by Class

Undying Sigil’s class data comes mostly from the Necrobinder, at a 33.3% win rate over 12 runs.

The Necrobinderappears in 1.4% of its runs (12 tracked)

Undying Sigil Details

Carried in 0.3% of runs, Undying Sigil is a shop relic typically acquired near floor 23.

Enemies with at least as much Doom as HP deal 50% less damage.

What Ends Runs with Undying Sigil

Runs carrying Undying Sigil end most often against Knowledge Demon Boss (16.7%) and Test Subject Boss (16.7%) — the share of its runs each accounts for is shown.

• Knowledge Demon Boss16.7% of runs
• Test Subject Boss16.7% of runs

See Also

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