Character Overview
The Ironclad starts with Burning Blood as his starting relic — he heals 6 HP at the end of every combat. This passive sustain is the reason he's the best beginner character in STS2: you can afford to take calculated damage in fights, trade aggressively, and recover between rooms in a way no other character can.
His core scaling stat is Strength, which increases the damage of every attack card by 1 per stack. A single Demon Form (gain 2 Strength per turn) combined with a handful of attacks turns the Ironclad into an unstoppable damage engine by Act 2. Strength is additive with all attack damage — Heavy Blade gains triple the benefit due to its 3× Strength multiplier.
In STS2, the Ironclad's Exhaust synergies have been completely reworked and are significantly stronger than in STS1. Cards like Dark Embrace (draw when exhaust), Feel No Pain (gain block when exhaust), and the new Exhaust Burst mechanic reward decks that intentionally thin through cards mid-combat. Read the full STS2 tier list for how Ironclad ranks against all other characters.
Build 1: Strength Ramp
Stack Strength as fast as possible using Demon Form and Limit Break, then let Heavy Blade, Whirlwind, and Cleave deal massive damage amplified by every Strength stack. At 10+ Strength, a single Heavy Blade swing deals 30+ damage before any upgrades. This is the most consistent, highest-ceiling build in STS2 and the default meta archetype for the Ironclad.
Core Cards
- Demon Form (Power) — Gain 2 Strength at the start of each turn. The backbone of the entire archetype. Take every copy offered; two copies are better than one.
- Limit Break (Skill) — Double your current Strength. One use of Limit Break at 6 Strength becomes 12; used again becomes 24. Upgraded to not Exhaust, it becomes one of the best cards in STS2.
- Heavy Blade (Attack) — 14 damage with 3× Strength scaling. At 10 Strength, this deals 44 damage for 2 energy. Upgrade it immediately — 18 damage base.
- Reaper (Rare Attack) — Deals damage to all enemies and heals HP equal to unblocked damage dealt. At high Strength it both clears rooms and restores you to full health.
- Whirlwind (Attack) — X cost, hits all enemies. Every hit benefits from Strength. At high Strength and 3 energy, this shreds multi-enemy encounters in a single play.
Supporting Cards
- Flex (Skill) — Gain 2 Strength this turn (lost at end of turn). Free Strength for a single turn's burst. Upgraded to give 4 Strength. Excellent for boss fights.
- Inflame (Power) — Permanently gain 2 Strength. Stacks with Demon Form for explosive total Strength values.
- Spot Weakness (Skill) — If enemy intends to attack, gain 3 Strength. Excellent in boss fights where enemies attack frequently.
- Pommel Strike (Attack) — 9 damage, draw 1 card. Cheap Strength-scaled attack that also maintains card flow. Always upgrade.
Strategy Notes
- Bash first turn of every fight — the Vulnerable debuff means your Strength-scaled attacks deal 50% more damage for the next 2 turns. Never skip Bash on turn 1.
- Upgrade Limit Break as soon as possible to remove the Exhaust. Once it doesn't Exhaust, you can double Strength every turn it's in hand.
- Heavy Blade gains 3 damage per Strength, not 1. Always prioritize Strength sources before playing Heavy Blade for maximum value.
- Avoid bloating the deck with mediocre attack cards — Strength makes every attack better, but dead draws still slow you down. Keep the deck lean at 15–20 cards.
Build 2: Exhaust Cycle
Use Exhaust as a resource — every card you burn generates Block, card draw, or additional damage through Exhaust-triggered powers. Corruption makes all Skills cost 0 but Exhaust on play, enabling explosive turns where you play 6–8 skills for free and trigger massive chain reactions. Exhaust synergies have been completely reworked in STS2 and are stronger than in the original game.
Core Cards
- Corruption (Power) — All Skills cost 0 energy but Exhaust when played. The core enabler. With Corruption active, you can play all your Skills in one turn and trigger every Exhaust payoff simultaneously.
- Feel No Pain (Power) — Gain 3 Block whenever a card is Exhausted. Each Skill played with Corruption active generates 3 free Block. Multiple copies stack.
- Dark Embrace (Power) — Draw 1 card whenever a card is Exhausted. Chains exhaust effects into more card draws, which Exhaust more cards. Upgraded to draw 1 more.
- Immolate (Attack) — Deal 21 damage to all enemies, add a Wound to your discard. Strong board-clear with Strength synergy. Always upgrade — 28 damage.
- Second Wind (Skill) — Exhaust all non-attack cards in your hand, gain 5 Block per card Exhausted. Synergizes devastatingly with Feel No Pain — each card exhausted triggers both effects.
Supporting Cards
- Fiend Fire (Attack) — Exhaust all cards in your hand, deal 7 damage per card Exhausted. With a 6-card hand, this deals 42 damage before Strength. Your burst finisher.
- Burning Pact (Skill) — Exhaust 1 card, draw 2 cards. Card filtering and Exhaust trigger in one play. Excellent for finding key powers early.
- True Grit (Skill) — Gain 7 Block, Exhaust a random card. Block generation that also feeds your Exhaust engine. Upgraded to Exhaust a chosen card.
Strategy Notes
- Corruption is the game-changer — don't play it until you have at least one Exhaust payoff (Feel No Pain or Dark Embrace) already active, or you'll burn your hand for nothing.
- The STS2 rework adds Exhaust Burst: certain cards trigger a bonus effect the first time they're Exhausted each combat. Learn which cards have Exhaust Burst triggers and prioritize those for Second Wind.
- Wounds added by Immolate are a liability — keep your deck tight and use True Grit (upgraded) to Exhaust them on demand.
- Card removal is still important here — remove Strikes aggressively since they're wasted in a hand you want to Exhaust via Second Wind or Fiend Fire.
Build 3: Block/Body Slam
Turn Block into offense. Barricade prevents Block from expiring between turns, letting you stack massive amounts over multiple combats. Body Slam deals damage equal to your current Block total. Juggernaut deals direct damage whenever you gain Block. When it comes together, you become an unkillable wall that also threatens 200+ damage in a single turn — but reaching that state requires specific cards and Barricade as a near-mandatory piece.
Core Cards
- Barricade (Power) — Block no longer expires between turns. This is the mandatory centerpiece. Without Barricade, the entire archetype doesn't function. Take it in every shop and reward.
- Body Slam (Attack) — Deal damage equal to your current Block. With 80+ Block accumulated over several turns, this one-shots most bosses in Acts 1–2.
- Entrench (Skill) — Double your current Block. Use after stacking Block for an explosive total. Upgraded to cost 1 energy.
- Juggernaut (Power) — Deal 5 damage to a random enemy whenever you gain Block. Every Defend, Shrug It Off, or block-generating card becomes a damage source simultaneously.
- Impervious (Skill) — Gain 30 Block. Exhaust. The strongest single Block card in the Ironclad's kit and your primary stacking tool.
Supporting Cards
- Shrug It Off (Skill) — Gain 8 Block, draw 1 card. Cheap Block generation that also cycles. Upgraded to 11 Block. Keep 2–3 copies.
- Iron Wave (Attack) — Deal 5 damage, gain 5 Block. Both effects scale with Strength. Excellent hybrid card for the early game before Barricade arrives.
- Sentinel (Skill) — Gain 5 Block; if Exhausted, gain 2 energy. Works with Exhaust synergies as a hybrid pickup if your run has both.
Strategy Notes
- This build is B-Tier precisely because it requires Barricade to function. If you don't find Barricade by Act 2, pivot to Strength Ramp — the cards overlap well enough.
- Body Slam is only good after Barricade. Don't take it before you have Barricade; it deals 0 damage at the start of a turn without stockpiled Block.
- Juggernaut + Shrug It Off + Entrench combos: play all your Block cards, then Entrench to double, then Body Slam for the finish. This is the build's kill combo.
- The Block/Slam archetype scales worse on higher Ascension due to enemies that reduce or pierce Block. Consider splashing a few Strength cards as an insurance damage outlet.
Relic Priority
| Priority | Relic | Why It's Good |
|---|---|---|
| Must-Pick | Vajra | Start each combat with 1 Strength. Free permanent damage multiplier for every fight — never pass this. |
| Must-Pick | Red Skull | While at or below 50% HP, gain 3 Strength. Combined with Burning Blood healing, you can safely dip low and gain a massive damage boost. |
| Great | Bag of Marbles | Apply 1 Vulnerable to all enemies at combat start. Every attack in your opening hand deals 50% more damage — effectively a free +50% first turn. |
| Great | Runic Cube | Draw 1 card whenever you lose HP. Compensates for the Ironclad's tendency to take chip damage, turning it into card advantage. |
| Great | Paper Frog | Elites apply 1 Vulnerable to themselves at combat start. Makes elite fights significantly easier and safer — especially important for Strength builds. |
| Good | Any Energy Relic | Corruption (0-cost Skills), Whirlwind (X cost), and Limit Break combos all benefit from extra energy. Always consider energy upgrades. |
General Tips
FAQ
Is the Ironclad the best starting character in Slay the Spire 2?
Yes, for almost all players. Burning Blood's 6 HP end-of-combat heal forgives mistakes, Strength scaling is intuitive to understand, and the Strength Ramp archetype has clear power spikes that are easy to identify. The only exception is if you already played significant STS1 — experienced players may prefer the Necrobinder's higher ceiling immediately.
How does Strength work in STS2 — does it cap out?
No hard cap. Strength adds +1 to the damage of every attack per stack. With Demon Form (2/turn), Inflame (+2 permanent), and Limit Break (double), you can reach 50+ Strength by Act 3 boss fights. Heavy Blade's 3× multiplier makes it the primary payoff — at 20 Strength, Heavy Blade deals 78 damage per swing for 2 energy.
What changed in Exhaust synergies between STS1 and STS2?
STS2 adds the "Exhaust Burst" mechanic — certain cards trigger a bonus effect the first time they're Exhausted in a combat. This makes Exhaust cycling decks significantly stronger since cards effectively have two uses: their played effect and their Exhaust trigger. Dark Embrace and Feel No Pain have also been buffed, with larger block and draw values than their STS1 equivalents.
Should I run both Strength Ramp and Exhaust Cycle?
Generally no — hybrid decks dilute both synergies. However, there's natural overlap (Strength cards benefit Exhaust payoffs too), and early in Act 1 before your archetype is defined, taking the best card offered is always correct. Commit to one archetype after the Act 1 boss once you see your relic options.
Is the Block/Body Slam build viable at high Ascension?
Yes, but it requires Barricade as a near-mandatory piece and is the least consistent of the three archetypes. At Ascension 15+, enemies deal enough damage that reaching high Block totals is harder, and several elites pierce or reduce Block. The build is rewarding when it comes together but is less reliable than Strength Ramp for consistent high-Ascension climbing. Treat it as a bonus if Barricade appears early, not as a plan-ahead strategy.
Related Guides
Sources & Community References
This guide synthesizes strategy discussion from r/slaythespire, the official STS2 Discord #strategy channel, and high-Ascension community data. Build ratings reflect Patch 0.98.1 consensus. Last updated: March 12, 2026.