The Battle Isles is the home of the Zaishen Order, and a sacred place for those who practice the art of war. All "high level" PvP arenas for the Prophecies Campaign, Factions Campaign, and Nightfall Campaign are concentrated on the Battle Isles. This is the place where players from all three chapters can meet, team up and compete against each other. This is what Acolyte Haitan explains about the Battle Isles: