Rule 103.2 · Starting the Game

If any players are using sideboards (see rule 100.4) or cards being represented by substitute cards (see rule 713), those cards are set aside. After this happens, each player’s deck is considered their starting deck.

If any players wish to reveal a card with a companion ability that they own from outside the game, they may do so. A player may reveal no more than one card this way, and they may do so only if their deck fulfills the condition of that card’s companion ability. The revealed card remains outside the game. (See rule 702.139, “Companion.”)

In a Commander game, each player puts their commander from their deck face up into the command zone. See rule 903.6.

In a constructed game, each player playing with sticker sheets reveals all of their sticker sheets and chooses three of them at random. In a limited game, each player chooses up to three sticker sheets from among those in the sealed product they opened and reveals them. In either case, that player has access to only the stickers on the chosen sheets during the game, and those sticker sheets remain revealed. (See rule 123, “Stickers.”)

In a Conspiracy Draft game, each player puts any number of conspiracy cards from their sideboard into the command zone. See rule 905.4.