Ironclad
Ironclad Strength Build – Slay the Spire 2 Complete Guide
Stack Strength, then go all-out on enemies.
Stack Strength with Demon Form, Limit Break, Inflame, and similar cards; pair with Vulnerability and heavy attacks for full output. Key relics include Paper Phrog, Girya, and the like. This guide will be expanded with card picks and relic priority by act as the STS2 meta develops.
Why Choose the Strength Build
The Ironclad Strength build is one of the most consistent archetypes in Slay the Spire 2. Stack Strength with powers and attacks, then multiply damage with multi-hit cards. It scales well into late game and has clear card and relic priorities.
Core Cards for Ironclad Strength Build
Essential Powers (Demon Form, Inflame, Limit Break)
Demon Form and Inflame are your main Strength sources; Limit Break doubles your Strength when you can play it. Prioritise at least one of these early.
Best Attack Cards (Whirlwind, Sword Boomerang, Heavy Blade)
Multi-hit attacks multiply your Strength on every hit. Whirlwind and Bludgeon are top picks; Sword Boomerang and Heavy Blade are also excellent when you have 10+ Strength.
Cards to Avoid
Avoid stacking too many low-impact attacks before you have a Strength source. Skip cards that don’t scale with Strength or that dilute your deck (e.g. excess block-only cards if you’re not playing Block/Body Slam).
Best Relics for Ironclad Strength Build
S-Tier Relics
Paper Phrog (Vulnerability), Girya, and relics that add Strength or multiply attack damage are top priority. Galactic Dust and Anchor support survival while you scale.
Strong Situational Relics
Ruined Helmet, Brimstone, and any relic that gives Strength or extra energy for playing powers fit this build. Block and draw relics are good if you’re still building your core.
Act-by-Act Strategy
Act 1 – Build Survival First
Take Inflame or Spot Weakness when offered; add a few solid attacks and block. Avoid diluting the deck. Path for campfires to upgrade key cards and for one or two elites if you have enough block/damage.
Act 2 – Lock In Demon Form
If you find Demon Form or Limit Break, prioritise them. Add multi-hit attacks (Whirlwind, etc.) and relics that scale Strength or damage. Your win condition should be clear by mid–late Act 2.
Act 3 – Execute the Win Condition
Your deck is set. Path for rest sites and optional elites; close games with high Strength and multi-hit or Heavy Blade–style finishers.
Ironclad Strength Build vs Other Ironclad Builds
Compared to the Ironclad One-Cut / Execute build, the Strength build scales over time and relies on powers and multi-hit attacks. The One-Cut build aims for high single-hit damage and a lean deck. Block/Body Slam and Exhaust builds are different archetypes; choose Strength when you see early Inflame or Demon Form and want consistent scaling.
Compare Ironclad One-Cut build · All Slay the Spire 2 Builds
Common Mistakes to Avoid
Taking too many attacks before a Strength source; skipping Inflame or Spot Weakness in Act 1; adding cards that don’t scale (e.g. one-off block cards with no synergy). Don’t over-draft — keep the deck focused so you draw Demon Form and your finishers consistently.
FAQ
- What is the best opening for Ironclad Strength build?
- Pick up Inflame or Spot Weakness in Act 1 to start Strength stacking early. Avoid taking too many attacks before you have at least one Strength source — survival first.
- Is Demon Form necessary for Ironclad Strength build in Slay the Spire 2?
- Demon Form is the strongest Strength scaling card but not mandatory. Limit Break plus Inflame can substitute. The key is reaching at least 10 Strength before your win-condition attacks.
- What attacks work best with high Strength?
- Multi-hit attacks multiply Strength on every hit. Whirlwind, Sword Boomerang, and Twin Strike all benefit massively. Heavy Blade gains triple Strength bonus making it exceptional in this build.
Related: Cards, Relics, Characters.