Should I upgrade Inferno in Slay the Spire 2?

Compare the upgraded text: At the start of your turn, lose 1 HP. Whenever you lose HP on your turn, deal 9 damage to ALL enemies.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.

What builds use Inferno?

Inferno appears in 1 tracked build: Bloodthirsty Rite of Rupture (B-tier, core card).

What character uses Inferno?

Inferno is tagged as a Ironclad card. See the Ironclad build hub for archetypes that care about it.

Updated for Data 2026-03-17Early Access — numbers may shift with patches.

Inferno

Ironclad · Power · Uncommon · 1 cost

Base

Upgraded

Card text

At the start of your turn, lose 1 HP. Whenever you lose HP on your turn, deal 6 damage to ALL enemies.

Inferno+

At the start of your turn, lose 1 HP. Whenever you lose HP on your turn, deal 9 damage to ALL enemies.

Builds that use Inferno

Archetypes that draft this card in real runs, with the role it plays.

BBloodthirsty Rite of RuptureIronclad · Core card

Build context

See the Ironclad build hub for archetypes that feature this card in real runs.

Related cards

Inferno FAQ

Should I upgrade Inferno in Slay the Spire 2?: Compare the upgraded text: At the start of your turn, lose 1 HP. Whenever you lose HP on your turn, deal 9 damage to ALL enemies.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.
What builds use Inferno?: Inferno appears in 1 tracked build: Bloodthirsty Rite of Rupture (B-tier, core card).
What character uses Inferno?: Inferno 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.