In limited play involving the Two-Headed Giant multiplayer variant, all cards in a team’s card pool but not in either player’s deck are in that team’s sideboard.
January 25, 2019 · Ravnica Allegiance
In limited play involving the Two-Headed Giant multiplayer variant, all cards in a team's card pool but not in either player's deck are in that team's sideboard.
June 1, 2014 · Conspiracy
In limited play involving the Two-Headed Giant multiplayer variant, all cards in a team’s card pool but not in either player’s deck are in that team’s sideboard.
February 1, 2014 · Born of the Gods
In limited play involving the Two-Headed Giant multiplayer variant, all cards a team opens but doesn’t include in either player’s deck are in that team’s sideboard.
September 30, 2011 · Innistrad
In limited play involving the Two-Headed Giant multiplayer variant, all cards a team opens but doesn't include in either player's deck are in that team's sideboard.
June 17, 2011 · Commander 2011
In limited play involving the Two-Headed Giant multiplayer variant, all cards a team opens
April 1, 2011 · Duel Decks: Knights vs. Dragons
In limited play involving the Two-Headed Giant multiplayer variant, all cards a team opens but doesn't include in either player's deck are in that team's sideboard.
February 4, 2011 · Mirrodin Besieged
In limited play involving the Two-Headed Giant multiplayer variant, all cards a team opens but doesn’t include in either player’s deck are in that team’s sideboard.
October 1, 2010 · Scars of Mirrodin
In limited play involving the Two-Headed Giant multiplayer variant, all cards a team opens
February 1, 2010 · Worldwake
In limited play involving the Two-Headed Giant multiplayer variant, all cards a team opens but doesn't include in either player's deck are in that team's sideboard.