Enemy HP stays on the normal band until Tough Enemies turns on.
Boss Threshold Guide
Boss & Elite HP Lookup
Check the rooms that actually matter. This page tracks elite and boss encounters by Act, room layout, ascension breakpoint, and player count so you can see the real HP line before the fight starts.
24Encounters tracked
12Elite rooms
12Boss rooms
A8HP breakpoint
Every room on this page flips to the higher HP band at Ascension 8.
Attack values change here. HP does not move again after Ascension 8.
The Act 3 boss modifier changes. HP bands remain the same as A8-A9.
Read The Room, Not Just The Unit
Multi-body fights break bad lookup pages. This tool groups the full encounter first, then shows each body inside it. Co-op totals scale each body separately and drop any fractional HP, which is how the room actually resolves.
A0-A7 stays on the base HP band. The first HP jump is Ascension 8.
Act 2 2.4x · Act 3 elite 2.4x · Act 3 boss 2.6x
Act 2 3.6x · Act 3 elite 3.6x · Act 3 boss 3.9x
Act 2 4.8x · Act 3 elite 4.8x · Act 3 boss 5.2x
Lookup Editorial
How To Read Boss And Elite HP Without Miscounting The Room
This page exists because boss and elite HP mistakes are almost always room-level mistakes. People remember one body, forget the encounter structure, mix up A8 with A9, or scale co-op totals the wrong way. The lookup is built to kill those errors first.
Reviewed2026-03-28
Room totals matter more than single portraits
This lookup is built for the encounters that actually swing runs: elites and bosses. Those rooms often stop being honest the moment you read only one body or one wiki number.
Multi-body encounters like The Kin, Knight Gang, Queen, or The Decimillipede punish lazy lookup habits. The real planning unit is the room, then the members inside it.
- Use it when lethal math, route risk, or co-op scaling depends on the whole encounter.
- Do not use a single-unit lookup for a multi-body room unless you want fake certainty.
Act, ascension, and player count drive the output
Search filters the encounter index by room name, member name, act, and room type. The ascension slider chooses which HP band to read. Player count picks the co-op multiplier set for that act and room tier.
The result cards then show four different views on purpose: current room total, base room total, tough room total, and the current multiplier line. That lets you compare the live room against the two HP breakpoints without doing mental translation.
- Act and room type trim the index before sorting.
- Sort by current HP is the practical default when you care about what is biggest right now.
- Copy current line exports the exact room total and member totals for the current A-level and player count.
A8 picks the HP band, then co-op scales each body separately
The page groups elite and boss appearances into encounter records first. For HP, A0-A7 read the base band and A8-A10 read the ascension HP band. A9 changes attack values, not HP. A10 changes the Act 3 boss rule, not the HP numbers shown here.
Co-op scaling happens per body, not on the final room sum. Each member uses the act-specific multiplier for the selected player count, fractional HP is truncated on that member, and only then are the room totals added together.
- A8 is the only HP breakpoint on this page.
- Act 3 boss rooms use a different co-op multiplier from Act 3 elites.
- Stack line means one member range multiplied by the count of that member in the room.
HP reference is not the whole combat script
This guide intentionally stops at HP math. It does not simulate intent order, artifact stacks, attack damage, or sequencing inside the encounter. That would be a different tool.
It also only indexes elite and boss appearances. If you want hallway packs or full enemy details, the enemy database route is the correct next stop.
- A9 and A10 do not increase HP again, so reading them as higher-HP bands is user error, not tool error.
- If you need attack breakpoints or damage patterns, pair this page with the full enemy database instead of demanding one page be everything.
Multi-body co-op rooms are where bad lookup habits break
Take any Act 3 elite room with multiple bodies. The correct co-op read is not to multiply one remembered room total by the player-count number and round once at the end. The page scales each body individually, floors the result on that body, and then rebuilds the room total from those scaled members.
That sounds pedantic until you compare numbers. In multi-body rooms, the truncation step can move the final total enough to matter, which is exactly why this lookup shows unit line and stack line separately instead of hiding the room anatomy.
- Step 1: choose A-level so the right HP band is active.
- Step 2: choose player count so the act-tier multiplier is correct.
- Step 3: read Current room total first, then inspect each member group if the room has multiple bodies.
- Step 4: never treat co-op scaling as one big multiplier pasted onto the last line of the page.
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.
Independent fan-made editors and data maintainers. This is not an official Slay the Spire 2 or Mega Crit property.
Final site operator and responsible editor. Final contact for corrections, rights notices, and maintenance triage via [email protected].
Visible copy, links, and page-level signals were checked in the latest review pass.
If a patch moves the numbers, wording, or assumptions behind this page, the page gets revised, narrowed, or rechecked again.
Tool pages cover the math, tables, and assumptions surfaced by the current UI on this route.
Bad inputs, hidden fight modifiers, or unsupported edge cases still produce bad conclusions. The tool does not guess those for you.
Editorial standardsRead the site-wide source boundary, patch workflow, correction path, and desk ownership rules.Patch workflowRead how the site rechecks data and editorial layers after a live update.Report stale dataUse the contact page or email the site operator when a number, rule, editorial note, or rights boundary looks wrong.
Encounter Filters
Search by encounter or member, lock the Act, then slide the ascension and player count to the line you care about.
Player count
Encounter Results
24 encounters in view. Current line: A0 · Solo.
Boss
Queen
Glory route. 2 bodies in the room, so room total matters more than any single target.
Current room total599 HP
Base room total599 HP
Tough room total630 HP
Current multiplier1.00x
Solo599 HP
2P1,557 HP
3P2,336 HP
4P3,114 HP
Room members
Queen
Unit line: 400 HP
Torch Head Amalgam
Unit line: 199 HP
Boss
The Doormaker
Glory route. Single-body room, clean lethal math.
Current room total489 HP
Base room total489 HP
Tough room total512 HP
Current multiplier1.00x
Solo489 HP
2P1,271 HP
3P1,907 HP
4P2,542 HP
Room members
Doormaker
Unit line: 489 HP
Boss
Kaiser Crab
Hive route. 2 bodies in the room, so room total matters more than any single target.
Current room total408 HP
Base room total408 HP
Tough room total428 HP
Current multiplier1.00x
Solo408 HP
2P978 HP
3P1,468 HP
4P1,958 HP
Room members
Crusher
Unit line: 209 HP
Rocket
Unit line: 199 HP
Boss
Knowledge Demon
Hive route. Single-body room, clean lethal math.
Current room total379 HP
Base room total379 HP
Tough room total399 HP
Current multiplier1.00x
Solo379 HP
2P909 HP
3P1,364 HP
4P1,819 HP
Room members
Knowledge Demon
Unit line: 379 HP
Boss
The Insatiable
Hive route. Single-body room, clean lethal math.
Current room total321 HP
Base room total321 HP
Tough room total341 HP
Current multiplier1.00x
Solo321 HP
2P770 HP
3P1,155 HP
4P1,540 HP
Room members
The Insatiable
Unit line: 321 HP
Elite
Mecha Knight
Glory route. Single-body room, clean lethal math.
Current room total300 HP
Base room total300 HP
Tough room total320 HP
Current multiplier1.00x
Solo300 HP
2P720 HP
3P1,080 HP
4P1,440 HP
Room members
Mecha Knight
Unit line: 300 HP
Elite
Knight Gang
Glory route. 3 bodies in the room, so room total matters more than any single target.
Current room total276 HP
Base room total276 HP
Tough room total294 HP
Current multiplier1.00x
Solo276 HP
2P661 HP
3P992 HP
4P1,323 HP
Room members
Flail Knight
Unit line: 101 HP
Spectral Knight
Unit line: 93 HP
Magi Knight
Unit line: 82 HP
Boss
Ceremonial Beast
Overgrowth route. Single-body room, clean lethal math.
Current room total252 HP
Base room total252 HP
Tough room total262 HP
Current multiplier1.00x
Solo252 HP
2P554 HP
3P831 HP
4P1,108 HP
Room members
Ceremonial Beast
Unit line: 252 HP
Boss
The Kin
Overgrowth route. 2 bodies in the room, so room total matters more than any single target.
Current room total248-249 HP
Base room total248-249 HP
Tough room total261-262 HP
Current multiplier1.00x
Solo248-249 HP
2P545-547 HP
3P818-821 HP
4P1,091-1,095 HP
Room members
Kin Priest
Unit line: 190 HP
Kin Follower
Unit line: 58-59 HP
Boss
Waterfall Giant
Underdocks route. Single-body room, clean lethal math.
Current room total240 HP
Base room total240 HP
Tough room total250 HP
Current multiplier1.00x
Solo240 HP
2P528 HP
3P792 HP
4P1,056 HP
Room members
Waterfall Giant
Unit line: 240 HP
Elite
Soul Nexus
Glory route. Single-body room, clean lethal math.
Current room total234 HP
Base room total234 HP
Tough room total254 HP
Current multiplier1.00x
Solo234 HP
2P561 HP
3P842 HP
4P1,123 HP
Room members
Soul Nexus
Unit line: 234 HP
Boss
Lagavulin Matriarch
Underdocks route. Single-body room, clean lethal math.
Current room total222 HP
Base room total222 HP
Tough room total233 HP
Current multiplier1.00x
Solo222 HP
2P488 HP
3P732 HP
4P976 HP
Room members
Lagavulin Matriarch
Unit line: 222 HP
Boss
Soul Fysh
Underdocks route. Single-body room, clean lethal math.
Current room total211 HP
Base room total211 HP
Tough room total221 HP
Current multiplier1.00x
Solo211 HP
2P464 HP
3P696 HP
4P928 HP
Room members
Soul Fysh
Unit line: 211 HP
Elite
Infested Prism
Hive route. Single-body room, clean lethal math.
Current room total200 HP
Base room total200 HP
Tough room total215 HP
Current multiplier1.00x
Solo200 HP
2P480 HP
3P720 HP
4P960 HP
Room members
Infested Prism
Unit line: 200 HP
Boss
Vantom
Overgrowth route. Single-body room, clean lethal math.
Current room total173 HP
Base room total173 HP
Tough room total183 HP
Current multiplier1.00x
Solo173 HP
2P380 HP
3P570 HP
4P761 HP
Room members
Vantom
Unit line: 173 HP
Elite
Entomancer
Hive route. Single-body room, clean lethal math.
Current room total145 HP
Base room total145 HP
Tough room total155 HP
Current multiplier1.00x
Solo145 HP
2P348 HP
3P522 HP
4P696 HP
Room members
Entomancer
Unit line: 145 HP
Elite
Terror Eel
Underdocks route. Single-body room, clean lethal math.
Current room total140 HP
Base room total140 HP
Tough room total150 HP
Current multiplier1.00x
Solo140 HP
2P308 HP
3P462 HP
4P616 HP
Room members
Terror Eel
Unit line: 140 HP
Elite
The Decimillipede
Hive route. 3 bodies in the room, so room total matters more than any single target.
Current room total120-138 HP
Base room total120-138 HP
Tough room total138-156 HP
Current multiplier1.00x
Solo120-138 HP
2P288-330 HP
3P432-495 HP
4P576-660 HP
Room members
Decimillipedex3
Unit line: 40-46 HP
Stack line: 120-138 HP
Elite
Bygone Effigy
Overgrowth route. Single-body room, clean lethal math.
Current room total127 HP
Base room total127 HP
Tough room total132 HP
Current multiplier1.00x
Solo127 HP
2P279 HP
3P419 HP
4P558 HP
Room members
Bygone Effigy
Unit line: 127 HP
Boss
Test Subject
Glory route. Single-body room, clean lethal math.
Current room total100 HP
Base room total100 HP
Tough room total111 HP
Current multiplier1.00x
Solo100 HP
2P260 HP
3P390 HP
4P520 HP
Room members
Test Subject
Unit line: 100 HP
Elite
Byrdonis
Overgrowth route. Single-body room, clean lethal math.
Current room total91-94 HP
Base room total91-94 HP
Tough room total99 HP
Current multiplier1.00x
Solo91-94 HP
2P200-206 HP
3P300-310 HP
4P400-413 HP
Room members
Byrdonis
Unit line: 91-94 HP
Elite
Phrog Parasite
Overgrowth route. 2 bodies in the room, so room total matters more than any single target.
Current room total78-85 HP
Base room total78-85 HP
Tough room total84-90 HP
Current multiplier1.00x
Solo78-85 HP
2P171-186 HP
3P257-280 HP
4P342-373 HP
Room members
Phrog Parasite
Unit line: 61-64 HP
Wriggler
Unit line: 17-21 HP
Elite
Skulking Colony
Underdocks route. Single-body room, clean lethal math.
Current room total74 HP
Base room total74 HP
Tough room total79 HP
Current multiplier1.00x
Solo74 HP
2P162 HP
3P244 HP
4P325 HP
Room members
Skulking Colony
Unit line: 74 HP
Elite
Phantasmal Gardeners
Underdocks route. Single-body room, clean lethal math.
Current room total26-31 HP
Base room total26-31 HP
Tough room total27-32 HP
Current multiplier1.00x
Solo26-31 HP
2P57-68 HP
3P85-102 HP
4P114-136 HP
Room members
Phantasmal Gardener
Unit line: 26-31 HP
FAQ
The common mistakes are always the same: mixing up A8 with A9, reading one body instead of the room, or treating co-op totals like one big multiplier on the final sum.
Does enemy HP keep increasing after Ascension 8?
No. Enemy HP flips to the tougher band at Ascension 8 and then stays there. Ascension 9 changes attack values, not HP. Ascension 10 changes the Act 3 boss rule, not the HP band.
Why does this page show encounter totals instead of only one enemy?
Because rooms like The Kin, The Decimillipede, Knight Gang, Queen, and Phrog Parasite are not single-body fights. If you only read one unit, your lethal math is wrong before the turn starts.
How is co-op HP calculated here?
Each enemy body is scaled by player count and the act multiplier for that room, then fractional HP is dropped. The room total is the sum of those scaled bodies, not one rounded multiplier on the final sum.