Iron Horde Incursion

The Iron Horde Incursion is a unique world event introduced with patch 6.0.2 and preceding the release of Warlords of Draenor. The event featured orcs coming through the Dark Portal and taking over Blackrock Mountain, as the Ironmarch and Black Iron groups.

History
The Iron Horde Incursion was the first engagement of the Alliance and Horde forces against the Iron Horde, which has invaded Azeroth through the repurposed Dark Portal. In a matter of days, the Iron Horde managed to gain complete control of the Blasted Lands: Okril'lon Hold was captured by the invading forces and served as a headquarter for the invading orcs, while Nethergarde Keep was razed and plundered, then captured by the orcs as well. Part of the invading Ironmarch forces joined Warlord Zaela of the Dragonmaw clan to put Garrosh Hellscream's plan of destroying Stormwind City via the iron star mounted within Blackrock Mountain into motion. The merged army under Zaela was named the Black Iron.

Blasted Lands

 * ''The Dark Portal in the Blasted Lands has turned blood red. Hundreds of strange-looking orcs are violently pouring into Azeroth, killing everything that stands in their path. Nethergarde and Okril'lon have already fallen, and while the Horde and the Alliance moved as quickly as they could to get reinforcements to their people, they are too late. The Iron Horde invasion has begun.


 * In this desperate hour, King Wrynn and Warchief Vol'jin have called upon their greatest champions to join the front lines in the Blasted Lands and do whatever they can to stop the Iron Horde . . . before the rest of Azeroth falls before them.

The world event will see a number of quests in a phased level-90 only version of the Blasted Lands, with the zone transformed by the invasion of the Iron Horde. For the full quest line, see Warlords of Draenor intro experience.

Upper Blackrock Spire

 * An advance party of Iron Horde forces has barged right out of the Blasted Lands and pushed all the way to Blackrock Mountain, where they found refuge and supplies in Upper Blackrock Spire. There can be only one response: the Alliance and the Horde of Azeroth must face this iron incursion head on.

A level 90 'preview' of the new Upper Blackrock Spire instance was to see players facing off against bosses including Orebender Gor'ashan, Kyrak, Commander Tharbek, Ragewing the Untamed, and Warlord Zaela. The instance's loot did provide an edge over current gear, allowing players to upgrade in preparation for the coming expedition to Draenor.

Beta version
Originally, the event featured much more enemies presented as rare mobs. Their diverse appearance hinted that they were followers of Garrosh from the True Horde and the Dragonmaw clan rather than coming from the. Okrilla and part of her forces were also to betray the Horde for the Iron Horde.

Unused IDs and sound files hint at a role for Warlord Dar'toon and Watch Commander Relthorn Netherwane.

Karazhan was initially planned to be visited in a scenario in order to investigate its link to the Dark Portal, but the idea was scrapped before the beta.