Heroes of the Alliance and the Horde have tested their mettle against the might of the sha, the Thunder King, and each other, but neither side could have predicted the boundless atrocities the Horde's warchief would commit.
Garrosh Hellscream's reckless thirst for power has led him to do the unthinkable: from beneath the Vale of Eternal Blossoms, he has seized the desiccated heart of an Old God to use as a tool of war, unleashing horrors upon the sacred valley. The brazen warchief has also turned against other members of the Horde to create a purely orcish force of his own. Now this "true Horde" is amassing strength within Orgrimmar's iron ramparts. With Garrosh bent on total victory, he plans to demonstrate the potency of the true Horde by conquering not just the Alliance but the whole of Azeroth.
It is up to you to purify the vale and bring Garrosh to justice. Should you fail, the frenzied legions of his true Horde will raze all you have ever known and mutate Azeroth into a hellish new Outland.