Slay the Spire 2 Status Effects & Mechanics

A status icon is a compact rule attached to a creature. The number beside it does not always mean “power.” For Strength, Dexterity, Thorns, and Focus, the number is a magnitude: more is stronger. For Weak, Vulnerable, Frail, and Intangible, it is usually a duration: more means more turns, not a harsher percentage. Artifact is different again—the number counts how many debuffs it can negate. Reading that number correctly is the first step toward predicting a turn instead of guessing at it.

Hover the icon whenever the wording is unfamiliar. Slay the Spire 2 is literal about timing: “at the start of your turn,” “at the end of the enemy turn,” and “this turn” are different windows. The description also tells you whether a rule affects Attacks, damage, HP loss, or Block from cards. Those categories overlap in everyday language but not in the game. Vulnerable boosts Attack damage; it does not automatically boost every effect that removes HP. Frail reduces Block from cards; it need not reduce every point of Block from every source.

The table below uses “status” in the broad player-facing sense. It includes buffs, debuffs, counters, and Rampage because players commonly search for “rampage status.” Rampage is actually a scaling Ironclad card, not a status icon. Keeping it in the same reference makes the distinction clear while answering the practical question: how does its in-combat growth stack?

Most status stacking falls into three families. Magnitude stacks add their numbers: 2 Strength plus 3 Strength becomes 5 Strength. Duration stacks extend a fixed rule: applying 2 Vulnerable to a target with 1 Vulnerable normally leaves 3 turns of Vulnerable, while the damage multiplier remains 50%. Charge stacks count separate uses: 2 Artifact can stop two debuff applications, and 2 Buffer can prevent two instances of HP loss. Confusing these families creates expensive mistakes, especially when planning a potion or a full-energy turn.

A few effects are counters with their own formula. Poison deals damage equal to its current number, then drops by one. Regen heals its current number, then drops by one. Doom compares its number with the enemy’s current HP at a particular settlement point. Slow grows as you play cards during one turn rather than persisting as a simple fixed bonus. These are best treated as small engines: ask when they trigger, what number they read at that moment, and what changes immediately afterward.

Temporary stats deserve special attention. A card may grant Strength or Dexterity “this turn” by pairing a positive stat change now with a negative change later. If Artifact blocks the later debuff, the positive stat can remain. Do not assume this interaction applies to every temporary effect, however; read the exact status and current card text. Patches can also tune values, so use the table as a rules framework and the in-game tooltip as the final authority for the build you are playing.

A clean way to plan is to divide combat into four checkpoints: card resolution, after-card triggers, end of turn, and start of turn. First, the card resolves in the order written. An Attack can deal damage and then apply a debuff, which means that same hit may not benefit from the newly applied Vulnerable. Next, powers that say “whenever you play a card” or “whenever you deal unblocked attack damage” react. At end of turn, effects such as Regen or Doom may check their condition. At the next start of turn, Poison, Block removal, card draw, and many powers resolve in their stated windows.

Within a multi-hit Attack, each hit is a real hit. Strength can be added to every hit, Thorns can retaliate against every hit, and Buffer can be consumed by the first qualifying instance rather than protecting the whole action. This is why a 5 × 3 attack is strategically different from a single 15-damage attack even before relics enter the picture. One loves Strength; the other is safer into Thorns and less likely to waste a large damage packet on a one-use shield.

Block usually lasts through the enemy turn and disappears at the start of your next turn. Blur delays that removal for one turn; Barricade prevents normal start-of-turn removal. Neither means Block is permanent against effects that explicitly remove it. Likewise, Intangible limits each damage or HP-loss instance to 1, while Buffer prevents a qualifying instance entirely. Against five hits, one Intangible turn usually takes five total damage; one Buffer charge stops only the first hit unless Block absorbs the others.

Artifact is a shield for debuffs, not a general immunity bubble. When a debuff would be applied, one Artifact charge is consumed and that application is negated. If a card applies several named debuffs, their written or internal resolution order matters. A low-priority debuff can strip Artifact so that the important Weak, Vulnerable, Poison, or Doom application lands afterward. This is often better than spending your premium setup card directly into the shield.

The same logic works defensively. If you have one Artifact and an enemy intends to apply Frail before a larger debuff next turn, decide which effect you actually want the charge to catch. Sometimes taking a minor debuff now preserves no benefit because the game consumes Artifact automatically. Other times, gaining Artifact just before a temporary stat penalty is scheduled can protect your scaling. Status planning is therefore about sequence, not only totals.

Weak and Vulnerable affect different sides of combat. Weak reduces Attack damage dealt by the affected creature; Vulnerable increases Attack damage received by it. When both sit on an enemy, your defense improves and your Attacks hit harder. Frail attacks the Block economy instead, so it is especially dangerous in decks relying on many small Defend-style cards. The percentages can also be modified by explicit powers or relics. Never silently replace the tooltip’s current value with a remembered value from the first game.

A status is valuable only if your deck can convert it. One turn of Vulnerable is outstanding when a heavy Attack or a hand of cheap Attacks is ready; it is nearly wasted when your hand contains only setup. Weak is most valuable on the enemy’s largest Attack turn, not automatically on the first turn. Poison wants enough defense and time to tick. Strength wants repeated or multi-hit Attacks. Dexterity wants several Block cards. Before drafting a status card, ask both “how much does it do?” and “how often can this deck cash it in?”

Card order is the cheapest source of extra power. Strip Artifact before applying the debuff you care about. Play non-Attack setup cards before attacking an enemy with Slow. Apply Vulnerable before the large hit when the card wording permits it. Spend Vigor on the attack with the best multiplier rather than the first attack available. Against Thorns, lead with fewer, larger hits and calculate retaliation before committing. These decisions cost no upgrades and often outperform adding one more mediocre synergy card.

Long fights reward scaling statuses, but they also expose timing weaknesses. Demon Form and Poison become impressive only if you survive the setup. Rampage needs redraws of the same copy, so a compact deck and draw control matter more than merely owning the card. Regen produces much more total healing when all of its declining ticks resolve. For real examples, compare archetypes in the build library, then verify exact card text in the card database.

First, do not treat every visible number as a stackable percentage. Three Vulnerable usually means three turns at the listed multiplier, not triple Vulnerable. Second, do not treat “damage” and “Attack damage” as synonyms. Poison and Doom can work around rules that mention Attacks, while an Attack still interacts with Weak, Vulnerable, Strength, and Thorns. Third, distinguish damage prevention from Block: Buffer and Intangible do not behave like a pile of Block, and Block-specific payoffs do not necessarily trigger from them.

Fourth, check whether the status belongs to you or the enemy. Strength on an enemy improves its Attacks; Weak on that enemy reduces them. Thorns on an enemy punishes your hits, while Thorns on you punishes theirs. Fifth, remember that a copied card and the original card can track card-specific scaling separately. Rampage increases “this card’s damage,” so each copy builds its own in-combat history rather than feeding a universal Rampage status.

Finally, plan settlement before pressing End Turn. Look at Poison and Regen ticks, retained Block, Doom thresholds, enemy intent, and duration counters. Then estimate the next hand rather than only the current total. Potions are particularly good at fixing timing because they do not consume card draw or energy; browse the potion database when you want to learn which status effects can be supplied on demand. For broader card power comparisons, the tier list is a starting point, not a substitute for your deck’s current interactions.