Updated for Data 2026-03-17Early Access — numbers may shift with patches.
Crimson Mantle
Ironclad · Power · Rare · 1 cost
Base
Crimson Mantle
Upgraded
Crimson Mantle+
Card text
At the start of your turn, lose 1 HP and gain 8 Block.
Crimson Mantle+
At the start of your turn, lose 1 HP and gain 10 Block.
Builds that use Crimson Mantle
Archetypes that draft this card in real runs, with the role it plays.
Build context
See the Ironclad build hub for archetypes that feature this card in real runs.
Related cards
Crimson Mantle FAQ
- Should I upgrade Crimson Mantle in Slay the Spire 2?
- Compare the upgraded text: At the start of your turn, lose 1 HP and gain 10 Block.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.
- What builds use Crimson Mantle?
- Crimson Mantle appears in 2 tracked builds: Barricade Iron Bastion (A-tier, core card), Bloodthirsty Rite of Rupture (B-tier, core card).
- What character uses Crimson Mantle?
- Crimson Mantle is tagged as a Ironclad card. See the Ironclad build hub for archetypes that care about it.
Patch history
SpireForge snapshots card text from Untapped exports dated 2026-03-17. When Mega Crit ships a balance patch, we re-run the scraper and refresh every affected URL—see /patches for the editorial log.