Version ledger / bosses
A Boss name is a version stamp, not a guarantee.
Updates can swap a Boss out or change how an encounter plays. This page keeps the current roster separate from historical names so an old strategy never passes for current advice.
| Entry | Detail | How to use it |
|---|---|---|
| Current roster | The active Boss set for the build you are playing | Match strategy to the version label before trusting a name. |
| Historical entry | Doormaker (Act 3) was listed in earlier catalogs | Keep as a historical note, not a current encounter. |
| Replacement note | Aeonglass replaced Doormaker in a major update | Use the current name when preparing for the run. |
Preparation
Four checks before trusting a Boss plan
| Check | What to confirm | Why it matters |
|---|---|---|
| Roster | Confirm which Boss is actually in the current build | An old name sends you toward an old plan. |
| Version label | Check the update that changed the encounter | A patch can swap a Boss or its attack pattern. |
| Deck answer | Name the specific threat your deck must answer | A generic build slogan does not prepare the fight. |
| Turn plan | Reserve a plan for the encounter's key turn | Preparation beats memorizing a fixed rotation. |
FAQ
Boss roster questions
Which Slay the Spire 2 Bosses changed between updates?
A major update removed Doormaker from Act 3 and added Aeonglass in its place. Catalogs that still list Doormaker as a current Act 3 encounter are showing an older roster.
Why do some Boss lists still show Doormaker?
Some catalogs have not caught up with the roster change. Doormaker is a historical entry; Aeonglass is the current replacement in the updated build.
How do I prepare for a Boss without guessing?
Confirm the current roster and version first, then name the specific threat your deck must answer and reserve a turn plan for that threat. Do not rely on an old name or a memorized rotation.
Does a Boss name guarantee the same fight?
No. An update can change an encounter's attack pattern even when the name stays the same. Match your plan to the current build.
Why keep historical Bosses on the page at all?
Historical entries explain why older guides conflict with the current game. Keeping them labeled prevents a stale name from becoming bad advice.
Version changes ripple outward
A Boss swap touches route planning, deck answers, and multiplayer encounters. Trace the change in the patch ledger before you rewrite a strategy.
Last updated: August 27, 2026 · Roster change checked August 26, 2026