Slay the Spire 2 deck planning workspace
Construct, test, and optimize your Slay the Spire 2 theoretical deck compositions.
Use this Slay the Spire 2 Deck Builder to compare starter decks, add card ideas, and watch the card-type mix and energy curve change. It is built for quick run planning: check whether your draft has enough attacks, skills, draw, and playable costs before you commit to a route.
A strong STS2 deck is not just a list of powerful cards. Use the builder alongside the card database and relic database to test synergy, removal priorities, upgrade targets, and whether a proposed deck can actually spend its energy on key turns.
Each supported character starts from a validated starter deck, so the tool can show how early picks shift your baseline. That makes it easier to spot when a deck needs frontloaded damage, steadier block, scaling, or a cleaner curve.