Beta v0.102.0

by hex3·v1.0.0·Updated 2026-04-09

Hardcore third act. The third act boss and some enemies/elites have been significantly strengthened to make them a real challenge. Highly configurable.

Screenshots 5 screenshots

About this mod Machine translation

Hardcore third act. The third act boss and some enemies/elites have been significantly strengthened to make them a real challenge. Highly configurable.

Act3Buff (Beta v0.102.0)

🎮 **Make Act 3 a real trial! **

Many players have reported that the third act of "Slay the Spire 2" is not challenging enough, and most decks that can reach this point can easily complete the level. I also feel that the Act 3 bosses are not up to par as final bosses (at least until Act 4 is released). So I beefed up all the parts of the third act that felt like they could be stronger... *maybe a little too much* 😈

This mod aims to increase the overall difficulty of Act III, making it a real struggle and test.

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🛠️ Highly configurable

**You can adjust, enable or disable any changes to this module through the module configuration options in the main menu! ** Complete control over the level of challenge you want.

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⚙️ Prerequisites and installation

**Pre-module:**

  • Baselib
  • Slay The Spire 2 Beta v0.102.0

**Installation method:**

  • Place the `Act3Buff` folder into the `mods` folder in your Slay The Spire 2 installation directory (usually located in `steamapps > common > Slay The Spire 2`).

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🏆 BOSS change details

**Doormaker**

  • **Max HP increase:** 489(512) → 550(600)
  • **"Inspection" skill:** Now becomes a multi-stage attack.
  • **"Mastery" damage increase:** 20(23) → 22(25)
💡 **Design Idea:** Gatekeeper's attacks now scale better with strength, giving you some breathing room in the early game, but snowballing faster in the later game. The extra health also makes it more of a damage race, forcing you to stay under its debuff for longer.

**Queen**

  • **"Chains" ability:** Now binds **4** cards in your hand.
  • **Torch Head Fusion Monster:** After the first two rounds, it will perform a multi-stage attack every other round.
  • **Torchhead Fusion Monster's multi-attack:** Now adds **1** layers of "Burn" to your draw pile.
💡 **Design Idea:** The Queen's card hindrance is now truly oppressive, requiring you to have a large number of card draw methods to deal with it properly. Torchhead Fusion Monsters deal extra damage and shove status cards directly into your draw pile, preventing you from stalling the fight and rewarding you for killing them quickly.

**Test Subject**

  • **New abilities gained:** Gain the **"Invisible"** status every other turn in **all phases**.
  • **Battle Start:** Starts with a layer of "Burning Roar" state.
  • **Phase 3:** Now adds 4(5) layers of "Binds" per turn.
💡 **Design Idea:** This gives the experimental subject a more "rival" flavor, and mixes in some "spire growth" characteristics. Makes the early stages more threatening while also preventing you from dragging on too long in the third stage.

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⚔️ Elite enemy changes

**Soul (soul hub)**

  • **Gain new abilities:** Ephemeral (gain 1 stack of Invisibility after being hit 4 times during your turn)
💡 **Design Idea:** Soul Nexus can now counter decks that rely on multiple attacks, requiring you to have some kind of burst damage method or survivability. This makes the threat level beyond that of other elites.

**Knight Trio**

  • **Ghost Rider:** Now gains the "invisible" status for the first 2 turns of combat, but has reduced maximum health (93(97) → 88(92)).
  • **Mage Knight:** Now blocks 6(8) damage on its opening turn and the turn the debuff is applied; its primary shield skill now blocks 16(20) damage; maximum health reduced (82(89) → 72(76)).
💡 **Design Idea:** Ghost Knight and Mage Knight now have more unique ways to offset your damage, in exchange for having less health. This requires you to deal with the effects of the "nothingness" state for a longer period of time and prevents you from being cleared quickly by AOE bursts.

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🐉 Changes to normal enemies

**Scroll Of Biting**

  • **Max health reduction on hit increased:** 2 → 3
  • **Max HP range increased:** 31(32) to 38(39) → 38(40) to 44(46) …

Install & use Install: follow the bundled instructions

  1. Unzip the archive from playbuff and read the bundled readme / instructions first.
  2. There is no universal mod manager for this game: some mods replace game files directly, some go into a game-specific Mods folder, and some need a game-specific community loader or tool first — follow the bundled readme.
  3. Place the files exactly as the readme says; mods with listed dependencies need those installed too.
  4. Launch the game to confirm it loaded; some games require enabling mods in settings or an in-game mod menu.

Install locations vary a lot between games and mods — the bundled readme is the most reliable guide.

File & checksum

Filename
Act3Buff
File size
162.1 KiB