The official trailer for World of Warcraft Patch 5.4: Siege of Orgrimmar. Garrosh Hellscream's treacherous excavation of the Vale of Eternal Blossoms has finished with sinister results -- not just for Pandaria, but for all Azeroth. In a compound beneath Ragefire Chasm, Garrosh has infused his followers -- the 'true Horde' -- with the pilfered essence of the Old God Y'shaarj.