🍀Rarity

Card and trait rarity will have major impacts on gameplay.

Cards have a capped edition size, and have rarity. A card's rarity number is the probability that it will be the next one minted from a pack opening.

The sum of rarity numbers in the set of cards that have not yet hit their edition cap is always 1, and the sum of rarity numbers in cards that already hit their cap is always 0. Thus the last remaining card in the last remaining pack of a set will have a rarity number of 1, and all others 0.

Rarity numbers can be computed by viewing the state of the blockchain.

Metadata leak: the above implies that it is possible to estimate what is in the later packs by analyzing what came out of the earlier packs. Depending on whether people think that is a big problem or not, we may disguise edition caps in order to resolve this, or pursue another approach.

Cards will also have traits. These are set on a case-by-case basis and their specific utility can only be inferred through gameplay (e.g. chaining). Trait rarity will be viewable as normal on OpenSea and other tools.

Randomness in how the cards are selected from the edition when a pack is opened will be verifiable and implemented using Chainlink VRF.