Build the exact card order for this turn. Track Strength, Vulnerable timing, Poison carry, Shiv generation, and Finisher hits without hand-waving.
15cards in the first release
0cards in the current line
0projected primary damage
3energy left after line
A-Grade Page Scope
Sequence Matters More Than Raw Card Prestige
This calculator is for turns where order, block breakpoints, Poison carry, and Shiv accounting decide whether the line is real or fake.
When It Helps
Use it for exact turn construction
It is strongest when you already know the hand, the target HP and Block, and the attack order you are trying to cash this turn.
Where It Lies
A pretty number does not make an invalid line playable
If the line breaks Energy, overspends Shivs, or relies on a mechanic outside the supported pool, the output still shows math but not a legally playable combat line.
Input Boundary
Supported pool only, real board state only
The page reads the listed supported cards, the exact sequence, and the live target state you enter. Unsupported cards, hidden triggers, and future draws stay outside the promise.
How It Works
How the Combo Damage Calculator Sequences Your Turn
This page resolves the card order you build and produces the real damage output for that exact sequence — including Strength scaling, Vulnerable timing, Poison carry-in, Shiv generation, and Finisher hits.
Reviewed2026-03-29
How to Use It
Build the sequence in the order you plan to play it
Add cards to the sequence panel in the exact order you intend to play them this turn. The calculator resolves each card left to right, carrying Strength stacks, Vulnerable status, active Poison, and generated Shivs forward through every step.
If you want to test whether playing the Vulnerable card before the big attack changes the total, swap the order and compare the output. That card-order question is the most common use case for this tool.
Set the enemy HP, Block, and initial Poison before building the line.
Use the Curated Openers section to load a common sequence as a starting point, then edit it.
The Output Summary at the bottom shows primary damage, Poison carry damage, and whether the sequence crosses the lethal threshold for the selected enemy range.
What It Models
Strength, Vulnerable, Poison, Shivs, and Finisher triggers
Each card in the library carries a defined damage formula, energy cost, and tag set. The calculator applies Strength to base damage, multiplies by 1.5 when Vulnerable is active on the target, accumulates Poison from apply effects, generates Shivs from the current Shiv sources, and checks Finisher conditions against the preceding attack count.
The projection window shows how residual Poison damage adds to the immediate total across extra turns, which matters for fights where the enemy survives the current turn but not the next.
Strength is applied at the point where each attack card resolves, not globally at the start of the sequence.
Vulnerable is applied by the card that inflicts it and takes effect on the next attack card in the line.
Shiv generation feeds the Shiv count live as you build the sequence, so Finisher cards read the correct available count.
Where It Stops
Supported pool only, one turn at a time
The calculator only models cards in the supported library, which covers the most common combo pieces for each character. Cards outside that set cannot be added to the sequence, and their effects on Strength, Poison, or Shiv generation are not reflected in the output.
The tool also models one combat turn at a time. It does not simulate enemy attacks, draw order, or multi-turn resource accumulation beyond the Poison carry projection.
Maintenance Signals
Who Maintains This Page
A calculator without ownership is just a fancy guess. These signals show who maintains the tool, which live ruleset it matches, and where the responsibility boundary stops.
Maintained bySTS2 Calculator Tools Desk
Independent fan-made editors and data maintainers. This is not an official Slay the Spire 2 or Mega Crit property.
Responsible editorSTS2 Calculator Site Operator
Final site operator and responsible editor. Final contact for corrections, rights notices, and maintenance triage via [email protected].
Last reviewedMarch 28, 2026
Visible copy, links, and page-level signals were checked in the latest review pass.
Patch verifiedCurrent Early Access combo damage model
If a patch moves the numbers, wording, or assumptions behind this page, the page gets revised, narrowed, or rechecked again.
Applies toOrdered damage sequencing, poison carry, Shiv counts, and payoff-turn math entered into this calculator.
Tool pages cover the math, tables, and assumptions surfaced by the current UI on this route.
DisclaimerTool output is only as honest as the current inputs and published assumptions.
Bad inputs, hidden fight modifiers, or unsupported edge cases still produce bad conclusions. The tool does not guess those for you.
Tune the live board state first. The line resolves top to bottom, so setup cards only help what comes after them.
Spawn HP Check
Pick a known enemy if you want a full-health lethal range on top of the live HP check. Set current Block or starting debuffs back to zero if you want a clean opener roll.
Curated Openers
Start from a known shell, then adjust the order or upgrades to match your hand.
Card Library
Search the supported pool and add cards in sequence order. Upgrade state is stored per card entry.
15 shown15 tracked
Strike
Silent · Basic Attack
1 Energy
Simple single-hit filler for clean baseline checks.
AttackStrikeStarter
BaseDeal 6 damage.
UpgradedDeal 9 damage.
Strike
Ironclad · Basic Attack
1 Energy
Basic attack filler for Ironclad vulnerable lines.
AttackStrikeStarter
BaseDeal 6 damage.
UpgradedDeal 9 damage.
Neutralize
Silent · Basic Attack
0 Energy
Cheap opener that counts for Finisher and adds Weak.
AttackStarterDebuff
BaseDeal 3 damage. Apply 1 Weak.
UpgradedDeal 4 damage. Apply 2 Weak.
Backstab
Silent · Uncommon Attack
0 Energy
Front-loaded zero-cost damage for burst turns.
AttackBurstInnate
BaseDeal 11 damage.
UpgradedDeal 15 damage.
Poisoned Stab
Silent · Common Attack
1 Energy
Hybrid hit plus Poison for mixed damage lines.
AttackPoison
BaseDeal 6 damage. Apply 3 Poison.
UpgradedDeal 8 damage. Apply 4 Poison.
Deadly Poison
Silent · Common Skill
1 Energy
Pure Poison setup for delayed lethal checks.
PoisonSetup
BaseApply 5 Poison.
UpgradedApply 7 Poison.
Dagger Spray
Silent · Common Attack
1 Energy
Two-hit sweep that scales cleanly with Strength.
AttackAoeMulti Hit
BaseDeal 4 damage to all enemies twice.
UpgradedDeal 6 damage to all enemies twice.
Blade Dance
Silent · Common Skill
1 Energy
Loads Shivs for burst turns and Finisher counts.
ShivSetupToken
BaseAdd 3 Shivs into your hand.
UpgradedAdd 4 Shivs into your hand.
Shiv
Silent · Token Attack
0 Energy
Zero-cost token that scales with Strength and Accuracy.
AttackShivToken
BaseDeal 4 damage.
UpgradedDeal 6 damage.
Finisher
Silent · Uncommon Attack
1 Energy
Repeats once for every Attack already played this turn.
AttackFinisherMulti Hit
BaseDeal 6 damage for each Attack already played this turn.
UpgradedDeal 8 damage for each Attack already played this turn.
Accuracy
Silent · Uncommon Power
1 Energy
Adds flat damage to every Shiv that follows.
PowerShivSetup
BaseShivs deal 4 additional damage.
UpgradedShivs deal 6 additional damage.
Haze
Silent · Uncommon Skill
3 Energy
Wide Poison setup for multi-target fights.
PoisonAoeSetup
BaseApply 4 Poison to all enemies.
UpgradedApply 6 Poison to all enemies.
Bash
Ironclad · Basic Attack
2 Energy
Single-target vulnerable setup with real upfront damage.
AttackDebuffStarter
BaseDeal 8 damage. Apply 2 Vulnerable.
UpgradedDeal 10 damage. Apply 3 Vulnerable.
Thunderclap
Ironclad · Common Attack
1 Energy
AOE opener that turns on vulnerable for the whole board.
AttackAoeDebuff
BaseDeal 4 damage and apply 1 Vulnerable to all enemies.
UpgradedDeal 7 damage and apply 1 Vulnerable to all enemies.
Inflame
Ironclad · Uncommon Power
1 Energy
Flat Strength gain for every attack that follows.
PowerStrengthSetup
BaseGain 2 Strength.
UpgradedGain 3 Strength.
Selected Sequence
Drag to reorder or use the arrow buttons. The calculator reads the line exactly as shown here.
0 cards0 energy0 attacks
Add cards from the library to start the line.
Shiv entries consume starting or generated Shivs. If the line spends more than it creates, the result stays visible but the line is flagged as invalid.
Output Summary
Immediate damage is this turn only. Projected damage adds the full Poison decay already on the board after the line ends.
Build a line first
Pick a few cards from the supported pool. The calculator only gets interesting once order matters.
Immediate primary damage0
Projected primary damage0
Immediate board damage0
Projected board damage0
Poison damage next turn0
Total future Poison0
Energy remaining3
End-of-line Shivs0
Immediate lethal on current HPNo
Projected lethal on current HPNo
Total Block removed0
Attacks counted by end0
Step Breakdown
Every row shows what changed after that card resolved.
No line yet. Add cards to see each step.
Supported Scope
This release stays tight on purpose. Clean rules beat fake coverage.
Supported now
Strength additive attack scaling
Weak 0.75 attack multiplier on the attacker
Vulnerable 1.5 attack multiplier on the defender
Poison decay forecasting
Shiv creation with Accuracy scaling
Finisher hit count from prior attacks this turn
Single-target and all-enemy sequencing
Current limits
No random-target effects in the first release
Primary target supports custom HP, Block, Poison, and Vulnerable
Other enemies share one Block input and start without custom Poison or Vulnerable
