Rule 809.3 · Emperor Variant
The Emperor variant uses the following default options.
Subrules
The range of influence is limited to 2 for emperors and 1 for generals. See rule 801, “Limited Range of Influence Option.”
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.
Example: At the start of an Emperor game, neither emperor can attack any opponents, even though both of the opposing generals are within their spell range.