809.2 Each team sits together on one side of the table. Each team decides the order in which it’s seated. Each team has one emperor, who sits in the middle of the team. The remaining players on the team are generals whose job is to protect the emperor.
809.3c A player can attack only an opponent seated immediately next to them, a planeswalker controlled by a player seated immediately next to them, or a battle protected by a player seated immediately next to them.
809.5 The Emperor variant includes the following specifications for winning and losing the game. All other rules for ending the game also apply. (See rule 104.)
809.6 The Emperor variant can also be played with any number of equally sized teams. If the teams have more than three players, the range of influence of each player should be adjusted.
809.6a Each general’s range of influence should be the minimum number that allows one general from an opposing team to begin the game within their range of influence. Each emperor’s range of influence should be the minimum number that allows two generals from opposing teams to begin the game within their range of influence. Players should be seated such that no emperor begins the game within the range of influence of another emperor.
809.7 In the Emperor variant, a team’s resources (cards in hand, mana, and so on) are not shared. Teammates may review each other’s hands and discuss strategies at any time. Teammates can’t manipulate each other’s cards or permanents.