406.1. The setup process for a game of Riftbound is defined in the Core Rules. See CR 110 Setup Process. Additionally:
406.1.a. In competitions where sideboards are allowed, players may exchange cards from their main deck and their sideboard after each game of a match.
406.1.b. Each player must shuffle their Main Deck and their Rune Deck. See 420 for more information on shuffling.
406.1.c. Each player must present their Main Deck, Rune Deck, and sideboard (if applicable to the format) to their opponents.
406.1.d. Each player may shuffle the Main Deck and Rune Deck of each of their opponents.
406.1.d.1. In team competitions, each player may shuffe the Main Deck and Rune Deck of one of their team’s opponents.
406.1.d.2. At Professional OPL, this is required.
406.1.d.3. A player may request a judge shuffle their deck in lieu of an opponent, to be honored at judge discretion.