World of Warcraft: Mist of Pandaria: Siege of Orgrimmar

Patch 5.4.0: Siege of Orgrimmar is a raid patch of World of Warcraft: Mists of Pandaria and focuses on the Siege of Orgrimmar from the leaders of the Alliance and the Horde to topple the ruthless warchief, Garrosh Hellscream. The patch includes a new raid, the Siege of Orgrimmar, a new area, the Timeless Isle, and much more. It also features the debut of the Proving Grounds, the Flexible Raid difficulty, and the Connected Realms feature.

As another Mists of Pandaria content patch would delay World of Warcraft: Warlords of Draenor, 5.4 is the last content patch of the expansion.