Slay the Spire 2 Ironclad Guide: How to Turn Pain into Power

The Ironclad ignores most of what makes this sequel punishing, mainly because his starting relic heals him after every fight whether he deserved it or not.

Burning Blood restores 6 HP at the end of every combat, and that single passive is doing more work than it looks like on paper. It means a genuinely bad Act 1, missed blocks, sloppy trades, cards that clearly weren't worth taking, still ends with a full health bar walking into the boss room. That forgiveness is a large part of why he sits high on my tier list. It's also the reason new players tend to learn the game's actual systems on him rather than anyone else in the cast.

A safety net only carries a run so far, though. By Act 3 the sustain stops mattering if there's no actual win condition behind it, and the Ironclad's got four of them worth knowing, ranging from straightforward to genuinely reckless.

Strength Stacking: The One Everyone Starts With

This is the least complicated path and the one most runs default into without trying. Strength adds flat damage to every attack played, so the early goal is just accumulating as much of it as possible through cards like Demon Form, Spot Weakness, and Inflame.

Limit Break is the card that actually defines this build. It doubles current Strength on cast, but normally Exhausts after one use, so upgrading it at a Campfire the moment it's available removes that restriction entirely and turns it into a repeatable engine instead of a one-time spike.

Once Strength climbs past 30 or so, single-hit attacks stop being efficient, since a huge chunk of the value is sitting in that flat bonus and it only applies once per card. Whirlwind, Sword Boomerang, and Twin Strike all hit multiple times, meaning that same Strength bonus gets applied over and over in a single card. Heavy Blade deserves specific attention here too, since it multiplies Strength scaling by three, turning what would otherwise be a modest buff into something closer to an execution.

Block as a Weapon: Winning by Doing Nothing

The defensive flip on the same character is arguably more satisfying to pilot well. Normally Block disappears at the start of the next turn, which is what keeps pure turtling from being a real strategy. Barricade removes that reset entirely, letting Block stack turn over turn without limit, and once it's active the fight essentially becomes about how tall a wall can get built before doing anything else matters.

Body Slam is what converts that wall into a win condition. It's an attack dealing damage equal to current Block, so 150 Block behind an active Barricade means Body Slam is dropping 150 damage for a single energy point. Juggernaut adds a second layer to this, dealing 5 damage to a random enemy every time Block is gained, which means a defensive turn is quietly doing damage on the side without a single attack being played.

A couple of relics matter specifically for this style. Calipers keeps 15 Block from resetting each turn instead of the full amount disappearing, functioning as a budget Barricade that costs no energy at all. Orichalcum works in the opposite direction, granting 6 Block automatically if a turn ends with none, which is more useful for the Strength build above since it patches the one real weakness of an all-offense deck that spends every point of energy attacking.

Exhaust Cycling: Turning a Penalty Into an Engine

This is where the Ironclad stops being simple. Exhaust normally just removes a card from the deck for the rest of the fight, a downside on cards that carry it. This build needs three specific Power cards to flip that downside into the actual win condition: Corruption drops every Skill card's cost to zero but forces them to Exhaust after being played, Dark Embrace draws a new card every time something Exhausts, and Feel No Pain grants Block on the same trigger.

Running all three at once means a zero-cost Block card gets played, Exhausts immediately, generates extra Block on the way out, and draws the next card in the same motion. Chain that enough times and an entire deck gets played in a single turn. The one real danger is running out of cards before the fight actually ends, so a reliable damage source like Juggernaut mixed in keeps the loop from just cycling defense forever without ever finishing anything.

Bloodletting: Winning by Hurting Yourself First

The riskiest build in the Ironclad's kit runs on the idea that self-damage is mathematically more efficient than most alternatives. Hemokinesis costs one energy for a large damage number, and the tradeoff is 2 HP lost every time it's played. Rupture is what turns that cost into fuel, granting a stack of Strength any time HP is lost on your turn, and Brutality compounds it further by draining 1 HP at the start of every turn in exchange for an extra card.

Reaper is the card that makes this entire strategy survivable rather than suicidal. It heals for however much unblocked damage gets dealt, so a fight spent bleeding health to stack Strength can end with a single swing of Reaper restoring the whole bar back to full in one motion. Self-Forming Clay is close to mandatory support here too, granting 3 Block on the turn after HP is lost, softening the exact kind of hit this build is constantly taking on purpose. It's also worth steering clear of Quest Cards while running this archetype specifically, since sitting at 15 HP is not the moment to have a dead unplayable card taking up space in hand.

For When You Just Want Chaos

If none of the four builds above sound appealing and the goal is just watching numbers spiral out of control, there's a genuinely fun combo worth chasing. Anger costs zero energy, deals solid damage, and drops a copy of itself into the discard pile every time it's played, which means it multiplies on its own without any extra setup.

Pair that with the Hellraiser power card, which auto-plays any Strike drawn for free against a random enemy, and a deck flooded with cheap attacks turns into a relentless stream of free damage without much input required. Add Battle Trance to draw a larger hand and let the chaos compound from there. It's not the most efficient way to build the Ironclad, but it's easily the loudest, and there's something fitting about a demon-possessed warrior just throwing punches until the math takes over.