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Undying Sigil — Necrobinder Relic in Slay the Spire 2

Updated 17 Oct 2026 Source Slay the Spire 2 relic data (spire-codex.com API), 296 relics retrieved 17 October 2026 By
Data status: The facts on this page were checked against the source named above. Game values can still shift with a patch, so re-check anything that looks off.
Undying Sigil relic art
Undying Sigil

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

PoolNecrobinder
RarityShop Relic
TriggerEnemies with at least as much Doom as HP deal 5
Price200 Gold at base, 170–230 across shop price modifiers

What it does

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

Relic data comes from the community-built Slay the Spire 2 compendium API and tracks the early-access build. Treat exact numbers as community-verified; the game is still in early access and values shift between patches.

Other Necrobinder relics

  • Bound Phylactery — At the start of your turn, Summon 1.
  • Phylactery Unbound — At the start of each combat, Summon 5. At the start of your turn, Summon 2.
  • Bone Flute — Whenever Osty attacks, gain 2 Block.
  • Book Repair Knife — Whenever a non-Minion enemy dies to Doom, heal 3 HP.
  • Funerary Mask — At the start of each combat, add 3 Souls into your Draw Pile.
  • Big Hat — At the start of each combat, add 2 random Ethereal cards into your Hand.
  • Bookmark — At the end of each turn, lower the cost of a random Retained card by 1 until played.
  • Ivory Tile — Whenever you play a card that costs 3 Energy or more, gain 1 Energy.

Other Shop Relic relics

Where to go next

All 296 relics — the full filterable list. Rarity system explains how often each tier appears.

Card database covers the cards that pair with this relic. Characters shows which run can find it.

Frequently asked questions

What does Undying Sigil do in Slay the Spire 2?

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

Which pool is Undying Sigil in?

It belongs to the Necrobinder pool and is Shop Relic.

How much does Undying Sigil cost?

200 Gold at base, 170–230 across shop price modifiers

When does Undying Sigil trigger?

Enemies with at least as much Doom as HP deal 5.

More Slay the Spire 2 guides

Sources

Figures and item data on this site are read from the game’s own reference wiki before publishing. Where a value could not be confirmed there, the page says so instead of filling the gap.