Rarity

Rarity is a derived trait of a card and is determined by the traits the card is expressing.

General Rarity Rules

In general, the rarity of a card is determined by how good the stats of the card are and how rare the card art variants are. You can read more about how traits work on our docs, but when a trait is rare, it typically has more 1s in the trait than 0s, and so rarity can be thought of as a function of how many more 1 bits there are then 0 bits in important traits for the card.
How rarity is calculated varies from card type and hero, with changes to how it is derived being aimed at keeping the distribution of rarities around:
  • Common - 12 out of 32 cards are common
  • Uncommon - 8 out of 32 cards are uncommon
  • Rare - 6 out of 32 cards are rare
  • Epic - 4 out of 32 cards are epic
  • Legendary - 2 out of 32 cards are legendary