Historical Rules · 23 August 2019
Rule 801.2
Official source text from the 23 August 2019 Rules release
A player’s range of influence is the maximum distance from that player, measured in player seats, that the player can affect. Players within that many seats of the player are within that player’s range of influence. Objects controlled by players within a player’s range of influence are also within that player’s range of influence. Range of influence covers spells, abilities, effects, damage dealing, attacking, making choices, and winning the game.