|Transient card properties|
Cards with rarity include all named playable characters, and thus may be considered the base card for a particular transient. In the story, the artwork of transients of this rarity are used for general-purpose story progression.
Limit breaking a card requires power stones and spell tokens whose quantity scales with rarity. A full list of cards with for their rarity can be found here.
AR Card Limitation
AR Equipment can only be equipped on cards that match its limitation criteria. Rarity is one of the potential criteria.