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602.3. Building From a Limited Pool

602.3.a. 602.1.a. The rules for constructing a Riftbound deck are found in CR 101 Deck Construction, except where modified here below for limited formats.
602.3.b. At high OPL, players may not use electronic devices to take notes or as a strategic aid during deckbuilding. At low OPL, this can be allowed by the head judge.
602.3.c. At high OPL, players may not receive any outside assistance during deckbuilding. At low OPL, this can be allowed by the head judge.
602.3.d. Limited decks can use battlefields from their provided card pool or any number of "blank" battlefields. Players may opt to use “blank” battlefields in place of battlefields they received in their provided card pool.
602.3.d.1. “Blank” battlefields function as battlefields that do not have any rules text. Otherwise, they adhere to all other normal battlefield rules as defined in the Core Rules.
602.3.d.2. At low OPL, “Blank” battlefields can be represented by anything agreed upon by all players in the game.602.3.d.2.a. At high OPL, “Blank” battlefields must be represented by any official Riftbound card, put in an opaque card sleeve with the cardback facing outwards.
602.3.e. At high OPL, players must register a starting configuration from the card pool provided and must register the remaining contents of their card pool as their sideboard.
602.3.e.1. Players must use their registered starting configuration in the first game of each match.
602.3.e.2. Legend, Chosen Champion, and Rune deck composition must be registered as part of a player’s starting configuration.
602.3.e.3. For “best of 1” competitions, players must register three battlefields to randomly select from during the start of game procedure, including any “blank” battlefields they wish to use.
602.3.e.4. For “best of 3” competitions, players may select any battlefield from their card pool or a “blank” battlefield during the start of game procedure.602.3.e.4.a. Players may only use a specific copy of a battlefield once per match, but may use the same named battlefield as many times as they have copies of it in their provided card pool.
602.3.f. At low OPL, starting configuration registration is not required and players may freely change the composition of their starting deck and sideboard between games and matches unless otherwise specified by the head judge.
602.3.g. For card pool generation and deck construction rules specific to each limited format, see Limited Formats below.