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601.1. Deck Construction
601.1.a. The rules for constructing a Riftbound deck are found in CR 101 Deck Construction, except where modified here below for the competition Constructed play format.
601.1.b. In competitions, a player’s Main Deck must be exactly 40 cards.
601.1.c. In competitions where a sideboard is allowed:
601.1.c.1. A player’s sideboard can include 8 or fewer cards.
601.1.c.2. A sideboard can consist only of valid Main Deck cards.
601.1.c.3. Limits on copies of named cards apply to the combination of main deck and sideboard.
601.1.c.4. A player may change their Chosen Champion to one from their sideboard or main deck that matches their Legend whenever sideboarding would be allowed.
601.1.c.5. See 403 for more information about sideboards.