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World of Warcraft patch 5.4, Siege of Orgrimmar, is now live in Blizzard Entertainment's massively multiplayer online role-paying game.
The last major patch for Mists of Pandaria will introduce the 14-boss raid named in the title, set in the city of Orgrimmar, updates to player-versus-player arenas, class and game balance changes, a Flexible Raid type aimed at more casual or social players and more. For everything on patch 5.4, you can read Blizzard's detailed overview and watch a video overview of the new features.