StS2 Clone Optimizer

StS2 Clone Optimizer

Keeps Pael's Growth's rest-site Clone event smooth on large decks — no more multi-second freeze.



The problem
Pael's Growth's rest "Clone" option duplicates every Clone-enchanted card in your deck — and that count doubles every rest. The base game does this the slow way: it clones the cards one-by-one with a full fly-in animation each, then previews all of the new cards at once (one card node per clone). Once you have many Clone-enchanted cards, choosing the option freezes the game for seconds in a single frame.

What this mod does
When a clone is large enough to matter, it duplicates the same cards (identical gameplay result) but:

• Batches the add and skips the per-card fly animation
• Spreads the work across frames so the game never hard-freezes — it stays responsive while cloning
• Shows a top-screen percentage progress bar so you can see it advancing (localized, 14 languages)
• Plays the clone effect on a small sample of cards instead of rendering one node per clone

Small clones are left completely untouched — the original animation is kept.

Does it change gameplay?
No. The exact same cards are cloned into your deck; only the rendering and timing of the clone are optimized. Card effects, RNG, and outcomes are unchanged.

Installation

1. Download and extract the archive.
2. Place the Sts2CloneOptimizer folder into your Slay the Spire 2 mods/ directory.
3. Enable the mod in-game.

Compatibility

• Client-side only — solo play recommended.
• No configuration required; it activates automatically only on large clone events.

Source
github.com/ing-gom/sts2-clone-optimizer — MIT License © 2026 inggom