Slay the Spire Ironclad Exhaust: What to Burn and What to Keep

Exhaust can turn a clogged Ironclad hand into protection or damage. It can also remove the card you needed to survive the next pass through your deck. The important question is not whether Exhaust is good or bad: it is what the current effect gives you, and what remains available afterward.

This guide covers the original Slay the Spire, not Slay the Spire 2 or the board game. The worked hands use base, unupgraded cards unless stated otherwise. Their numbers assume no other relic effects, buffs, debuffs or enemy damage modifiers; the Second Wind example explicitly adds an already-active Feel No Pain.

Separate three kinds of removal

A card from your deck returns after the combat even if you Exhaust it during the fight. You are not permanently removing that card from your run's deck. However, the fact that it returns later does not help you finish the encounter you are currently losing.

Look beyond the hand before burning something important. If this is your only remaining reliable Block card, or the attack carrying your damage plan, removing it may leave a weak second cycle. If it is a basic card that your stronger cards have made unnecessary, taking it out of the cycle can be useful.

Count only the cards the effect actually removes

Three Ironclad cards illustrate different kinds of control:

The played card is not one of the other cards sitting in your hand. Second Wind does not include itself in its Block count. Fiend Fire's final self-Exhaust is separate from the cards that determine its damage.

Do not count the whole deck, either. A Wound waiting in your draw pile is not fuel for a hand-targeting effect right now. Start with the cards actually present when you play it.

True Grit: decide whether you control the target

Base True Grit does not let you point at the least useful card. If a vital attack and a Wound are both still in hand, the random selection can remove either. Upgrading it changes that decision from accepting a random loss to choosing which card leaves the combat.

You can sometimes narrow the random selection by playing cards you want to preserve first. That requires enough Energy and a reason to play those cards now. It is not a free substitute for the upgrade.

A controlled last-card example

Suppose your remaining hand is True Grit, Strike, Defend and Wound, with 3 Energy available. There are no additional effects drawing or creating cards. Playing Strike, then Defend, then True Grit leaves Wound as the only card in hand for True Grit to Exhaust.

That sequence spends all 3 Energy, deals Strike's 6 base damage and produces 5 + 7 = 12 Block. Strike and Defend go to the discard pile, so you have not burned either for the remainder of the fight.

This is useful when those plays suit the turn. If you urgently need a different card or cannot afford all three plays, you cannot assume the same controlled target. With True Grit+, you can choose Wound directly and decide separately whether Strike or Defend deserves Energy.

Second Wind: more Block now can mean less defence later

Second Wind removes non-Attacks, not just junk. Skills, unplayed Powers, Statuses and Curses can all be caught in the same sweep. Before playing it, identify any useful non-Attack you want to use first.

For example, a Power in your hand is not active yet. Burning it does not activate its effect. Playing it first can preserve its ongoing benefit, but you must be able to afford that setup as well as the rest of the turn.

Worked hand: 24 Block or 21 Block

Assume you already have one base Feel No Pain active, giving 3 Block per Exhausted card. You have at least 2 Energy, no existing Block, and this hand:

• Second Wind
• Wound
• Dazed
• Defend
• Strike

Compare two sequences:

Playing the defensive card first gives less total Block in this particular hand. You traded away one Second Wind fuel card and one Feel No Pain trigger, then added Defend's own 5 Block.

That does not make the second sequence automatically wrong. It preserves Defend in your discard pile. The first sequence removes it from future normal draws in this fight and saves an Energy. Both leave Strike available in hand.

If you need 24 Block to cover the incoming attack, the immediate sequence solves a problem that the 21-Block sequence does not. If 21 is sufficient and you expect several more cycles with few other defensive cards, preserving Defend may be worth the Energy. If another useful play needs that extra Energy now, the cheaper sequence may be preferable even when its Block exceeds what you need.

The decision is therefore three-way: current protection, remaining Energy and the cards left for later turns. Counting only the largest Block number misses two of them.

Dazed and Wound are not identical cleanup targets

Dazed is Ethereal: if it remains in your hand at the end of the turn, it Exhausts itself. Discarding it instead sends it to the discard pile rather than triggering that automatic Exhaust. Wound does not have Dazed's end-of-turn escape route.

When choosing an Exhaust target, this distinction matters. If both are unwanted and nothing else changes the decision, removing the Wound deals with the card that would otherwise keep circulating. Dazed can leave on its own at the end of the turn.

That does not mean Dazed is useless as immediate fuel. In the Second Wind example, consuming it now contributes to the card's Block. The point is to distinguish a current-turn payoff from cleaning a card out of later draws. The same target can be valuable for one reason and unnecessary for the other.

Fiend Fire: playing an attack first can reduce total damage

For this separate comparison, no Feel No Pain or other Exhaust-triggered effect is active. You have 3 Energy, an enemy with no Block or damage modifiers, and the following base-card hand: Fiend Fire, Strike, Defend, Wound and Dazed. Assume the enemy survives long enough for the full sequence to resolve.

Playing Strike first adds 6 damage but removes one 7-damage fuel card from Fiend Fire. The result is one less total base damage, not six more. It also costs another Energy.

Again, the future-card difference matters. If this turn ends the fight, keeping Strike for a later draw has no value. If the encounter continues and you are running short of attacks, preserving a reusable damage card may matter more than that single point.

Neither sequence preserves Defend in this example. If losing it would leave you unable to handle later attacks, reconsider the whole Fiend Fire play rather than choosing between two lines that both create the same defensive weakness.

Keep the engine and the fuel separate

An Exhaust payoff is useful only when it is active or can be played in time. Feel No Pain sitting in the hand you are about to burn is not the same as Feel No Pain already supplying Block. Similarly, drawing more cards does not by itself give you Energy to play them.

Before a large Exhaust play, identify the cards that produce your future damage, protection or scaling. Then identify which cards are expendable in this particular encounter. A basic Defend can be expendable in one fight and essential in another; its name does not decide the answer.

Make the final check against the enemy's current intent. Count the immediate result, reserve the Energy for any required setup, and inspect what will remain in the draw and discard piles. Exhaust is most useful when it removes cards you no longer need without removing the way you intend to win.