Upgrading cards

Slay the Spire: the Smith action offers a card upgrade instead of health recovery.Smith opens the choice of a card to upgradeThe alternative uses the same rest stop
Slay the SpireA campfire upgrade
  1. Smith opens the choice of a card to upgrade
  2. The alternative uses the same rest stop
© Mega Crit · Source ↗

An individual card gains power or a new property. Upgrading changes its role in the deck and competes with other uses of progression resources.

Design tips

  • Let players compare the card before and after upgrading.
  • Evaluate the upgrade in different decks as well as on its own.

Examples