The Future

At the beginning of the game, after a player
decides to keep their opening hand and resolve
mulligans, that player sets aside at least four
cards from their side board. Basic land cards may
not be included. At the beginning of the first
upkeep, each player shuffles the cards they set
aside into a combined deck referred to as
'The Future.' During each draw step, after
a player draws their card for the turn, that
player may exile a card from their hand. If
they do, they draw a card from