Tundra Arms League is an advanced version of Foundry Battle. The top 64 Legions that sign up in each Zone will qualify for the Tundra Arms League. If fewer than 64 Legions sign up, all Legions in the Zone will be eligible to participate. However, if fewer than 16 Legions sign up, the Tundra Arms League won't be held in that Zone. The Tundra Arms League consists of the Elimination Phase and Championship Phase, where the Legions face off in head-to-head battles to determine the champion, runner-up, and third place.