# STS 2 Deck Builder

Build a Slay the Spire 2 deck from the card database, filter by character, and inspect energy cost and card-type distribution as you add copies. This is a planning workspace for a run, not a win-rate predictor.

Interactive tool: /tools/slay-the-spire-2/deck-builder/

## Build a deck for Ironclad, Silent, Defect, Necrobinder or Regent

Filter the library by character color, search a card name, and add copies to the deck. Character cards from different colors cannot be mixed in the planner; colorless, event, curse, status, quest and token cards remain available. This rule keeps the planning list coherent without simulating every in-game acquisition path.

## Read the energy curve and card-type mix

The chart groups selected cards by printed numeric energy cost and counts Attack, Skill, Power and other card types. Duplicate copies count separately. Cards with variable or unavailable costs are shown outside the known-cost average so they do not distort it.

## Open the source card before committing to a run

The planner links each selected card to its database record, where cost, rarity, target and effect are shown with source information. Relics, potions, upgrades, draw order and encounter context can change how valuable a card feels in an actual run.

## Common questions

### Can I build a Slay the Spire 2 deck for the Necrobinder or Regent?

Yes. Use the color filter to find either character’s cards and add copies to the planning deck.

### How is average energy cost calculated?

The average uses selected copies whose database records contain a nonnegative numeric cost. Variable and unavailable costs are excluded.

### Does this deck builder predict a win rate?

No. It summarizes selected cards and does not simulate relics, enemies, draw order or encounter outcomes.

### Can I mix character colors?

The planner keeps character cards within one color. Colorless and special card groups may be added alongside that character color.


Source database: /games/slay-the-spire-2/