Slay the Spire 2 Deck Builder
Build an STS2 deck, rank it for Act 1, 2, or 3, and get automatic feedback on strengths, weaknesses, and possible upgrades.
Deck Builder
Add cards and relics, then the ranker will evaluate the deck for the selected act.
Cards
Search and add cards to your deck.
Act 1 Rank
Fast-fight damage and ability to clear regular combats cleanly.
Reliable block, mitigation, and staying power.
Long-fight growth for elites, bosses, and slower combats.
How often you can find and execute your important lines.
Energy smoothness, low clunk, and playable turn cycles.
Whether the deck is a focused engine instead of a random pile.
More Info — Strengths, Weaknesses & Suggestions
Strengths
Weaknesses
What This Deck Needs Next
Suggested Cards
Deck Builder
Add cards and relics, then the ranker will evaluate the deck for the selected act.
Cards
Search and add cards to your deck.
STS2 Deck Builder FAQ
Quick answers about how this deck evaluation tool works.
What does the STS2 Deck Builder do?
This tool helps you evaluate a Slay the Spire 2 deck by scoring its damage, defense, scaling, consistency, efficiency, and synergy for Act 1, 2, or 3.
Does the deck builder suggest upgrades?
Yes. The tool automatically highlights deck strengths, weaknesses, what the deck needs next, and suggested cards that could improve the build.
Can I use this for different acts?
Yes. You can switch between Act 1, Act 2, and Act 3 so the scoring weights match the stage of the run more closely.
Does this work like an STS2 boss checker?
Not yet. This version is act-based. Boss-specific checking is planned as a future expansion so decks can be judged against specific encounters.
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