Should I upgrade Demon Form in Slay the Spire 2?

Compare the upgraded text: At the start of your turn, gain 3 Strength.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.

What builds use Demon Form?

Demon Form appears in 1 tracked build: Demon Form Juggernaut of War (S-tier, hero card).

What character uses Demon Form?

Demon Form 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.

Demon Form

Ironclad · Power · Rare · 3 cost

Base

Upgraded

Card text

At the start of your turn, gain 2 Strength.

Demon Form+

At the start of your turn, gain 3 Strength.

Builds that use Demon Form

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

SDemon Form Juggernaut of WarIronclad · Hero card

Keywords

Strength

Build context

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

Related cards

Demon Form FAQ

Should I upgrade Demon Form in Slay the Spire 2?: Compare the upgraded text: At the start of your turn, gain 3 Strength.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.
What builds use Demon Form?: Demon Form appears in 1 tracked build: Demon Form Juggernaut of War (S-tier, hero card).
What character uses Demon Form?: Demon Form 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.