Skip to content
SPIRE HANDBOOKSLAY THE SPIRE 2
BuildsCharactersCardsRelicsPotionsChallengesRunsGuides
Search/
Home/Cards/Demon Form
Demon Form artwork
The IroncladPower

Demon Form

Energy
3
Rarity
Rare
Pool
Ironclad
Target
Self

Base card

At the start of your turn, gain 2 Strength.

Upgraded

At the start of your turn, gain 3 Strength.
Used inIronclad Strength and multi-hit ↗
Main branchLast updated 2026-11-02
Demon Form (Ironclad card)/images/cards/demon_form.webpAt the start of your turn, gain 2 Strength.

Decisions and interactions

Ironclad Strength and multi-hitInflame is a more compact setup than Demon Form, whose recurring Strength is most relevant when a fight lasts long enough to use it.Rest or upgrade before the next fight?Compare the HP recovered with a specific upgrade and the encounters before the next safe stop.Northernlion’s Vulnerable and Strength runIn the later attempt, Vulnerable and Dominate provide Strength, while Demon Form offers recurring scaling.

Recorded examples

Northernlion’s Vulnerable and Strength run artwork
Run study

Northernlion’s Vulnerable and Strength run

An Ascension 8 victory built around Vulnerable, Dominate and multihit attacks. Compare immediate Strength with Demon Form’s delayed return.

IroncladRecorded runStrength
Sources

Last updated 2026-11-02.

  • Game reference data: main branch

Related references

Northernlion’s Vulnerable and Strength runRun studyThe IroncladCharacter mechanics and starting kitIronclad Strength and multi-hitStrategy using this card, relic or character

Strategies using this

All strategies ↗
Ironclad Strength and multi-hit artwork
ironclad

Ironclad Strength and multi-hit

Use Strength to improve each hit of a multi-hit attack, with Vulnerable increasing the damage that reaches the target. Choose faster Strength for short fights and pe…

StrengthMulti-hitVulnerable
SPIRE HANDBOOK

An independent Slay the Spire 2 strategy reference.

Game artwork and game data © Mega Crit. Extracted reference data and images via Spire Codex.

Build comparisonCombat decisionsUnusual buildsChallenge routesRecorded runsEnemiesEvents & AncientsGameplay guidesAchievements & badgesVersion changesOfficial game ↗