103. To play Riftbound , a player must have two Decks, a Champion Legend , and a number of Battlefields determined by the Mode of Play.

103.1. 1 Champion Legend

103.1.a. This is placed in the Legend Zone at the start of the game.
103.1.b. This will dictate the Domain Identity of the Main Deck.
103.1.b.1. Cards included in your Deck must abide by your Domain Identity.
103.1.b.2. Your deck’s Domain Identity is dictated by the domains of your Champion Legend. In the default card frame, these domains appear as symbols in the legend’s upper left corner.
103.1.b.3. If a card has a single Domain , then that card is permitted in the Domain Identity that corresponds to the same Domain.
103.1.b.4. If a card has more than one Domain , then that card is permitted only in a Domain Identity that contains all of the indicated Domains on that card.

103.2. A Main Deck of at least 40 cards 1 Chosen Champion Unit Units Gear Spells

103.2.a. Chosen Champion
103.2.a.1. This will be placed in the Champion Zone at the start of the game.
103.2.a.2. Must be a champion unit with a champion tag that matches the tag on your Champion Legend. Example: Loose Cannon has the tag Jinx . Therefore, a player could choose Jinx, Rebel or Jinx, Demolitionist as their Chosen Champion , because they also have the tag Jinx . Example: Tibbers has the tag Annie , but it is a signature unit, not a champion unit. It cannot be your Chosen Champion , even if your Champion Legend has the tag Annie .
103.2.a.3. A player’s Chosen Champion is both the specific card chosen for this slot during Deck Building and also any Champion Unit with the same name as the specific card selected for this specific slot during the course of play. Example: A player chose Jinx, Rebel as their Chosen Champion. One copy of Jinx, Rebel starts the game in their Chosen Champion zone. Any additional copies of Jinx, Rebel in their Main Deck, their hand, their trash, or on the board also count as their Chosen Champion for any game rules and effects that care about Chosen Champion status during the game.
103.2.b. Your Main Deck can include up to 3 copies of the same named card.
103.2.b.1. This includes your Chosen Champion. Example: A deck could include Volibear, Furious as its Chosen Champion and still include 2 more copies of Volibear, Furious.
103.2.b.2. Cards have different names even if they represent the same character. Example: A deck could include 3 copies of Yasuo, Remorseful and 3 copies of Yasuo, Windrider, because they have different names.
103.2.c. Subject to Domain Identity.
103.2.d. Your deck may only contain 3 total Signature cards that have the same Champion tag as your Champion Legend.
103.2.d.1. Regardless of name, a deck may only contain a sum total of 3 Signature cards.
103.2.d.2. All of the Signature cards must have the Champion tag that corresponds to the Champion Legend of the deck.
103.2.d.3. Signature cards are not Champion units and cannot be placed in the Champion Zone .
103.2.e. During Gameplay, the Main Deck is Secret Information.
103.2.e.1. It cannot be looked through or revealed unless instructed by a card effect.

103.3. Rune Deck

103.3.a. 12 Rune Cards
103.3.a.1. Cards in this deck must be of the Domain Identity of your Champion Legend.
103.3.b. Must be shuffled and kept separate from the Main Deck.

103.4. Battlefields

103.4.a. The number will be dictated by your Mode of Play.
103.4.b. Subject to Domain Identity if applicable.
103.4.c. Cannot include more than one of a Battlefield of the same name when there are more than one required for the deck.