ClassAbilitiesMod

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💬 Community Discord

Bug reports, balance feedback, mod chat — all welcome. EN/JP both fine.

バグ報告・フィードバック・雑談歓迎、英日どちらも OK。

→ https://discord.gg/BjjAdjRdHz

A companion mod to STS2 Starting Deck Select that gives every starter preset its own pair of signature moves. Build an Ultimate meter through play and unleash a preset-specific finisher, or dip into a Tactical on a turn cooldown for tempo plays. Each preset is tuned individually — 36 unique moves across 5 classes — and every cast plays through a painterly per-character cinematic.

What's new in v0. 3. 3

Major balance pass: 5 ult redesigns (Conflagration / Apex Claw / Void Convergence / Meteor Shower / Onslaught), Osteomancy single Summon 25 (was bogus multi-Osty), 8 tactical adjustments. New ClawReboundPower mechanic on Claw Prime: the first claw card you play this turn returns to your hand. Fixed: ult/tactical buttons being clickable outside the player turn, plus 8 ult self-refill loops. シヴ→ナイフ rename. See the Changelog tab for the full list.

Wiki (EN/JP): https://wikiwiki.jp/sts2_starter/

Supported languages

- Japanese (日本語)

- Chinese (中文) — planned for a future update.

Installation instructions

1. Install BaseLib v3. 0. 9 or later — required for save persistence and multiplayer state sync. Without BaseLib your ult charge will reset on save/load and multiplayer will desync.

2. Install STS2 Starting Deck Select v1. 5. 1 or later — this mod requires it for preset detection.

3. Download the latest Sts2ClassAbilities-v0. 3. 3.zip from the Files tab.

4. Extract the zip into <Slay the Spire 2 install>/mods/. You should end up with three files next to the existing mods:

- Sts2ClassAbilities.dll

- Sts2ClassAbilities.json

- Sts2ClassAbilities.pck

5. Launch the game. Start a run and pick any starter preset — your Ultimate and Tactical orbs appear above the vanilla energy orb.

Multiplayer note

All players in the lobby must run the exact same versions of Sts2ClassAbilities, Sts2StartingDeckSelect, and BaseLib. Mismatched versions cause state checksum desync and disconnects (the typical symptom is a black screen at the Neow stage). The simplest way to coordinate is to share your full mods folder as a zip with the other player.

Main features

- 18 Ultimates — one per starter preset, charged by preset-themed triggers (apply Poison, for