12 Rune Cards 1. Cards in the Rune Deck must be of the Domain Identity of your Champion Legend.
§ 103.3.a Core Rules PDF (officieel)
§ 103 To play Riftbound, a player must have a Main Deck, a Rune Deck, a Champion Legend, and a number of Battlefields determined by the Mode of Play. These are collectively referred to as a player’s deck.
§ 103.3 Rune Deck
