Siege of Icecrown Citadel

With the destruction of the archlich Kel'Thuzad and the frost dragon Sapphiron by Sun King Kael'thas Sunstrider and Al'ar, Corp'rethar: The Horror Gate could no longer withstand the Northern Expedition's champions and was completely overrun.

The two Scourge banners before Corp'rethar: The Horror Gate were replaced by the blue and red banners of the Alliance and Horde, declaring that the Alliance's Valiance Expedition and the Horde's Warsong Offensive had occupied Corp'rethar: The Horror Gate.

Next came the Scourge's true heartland. Beyond the ice field known as the Court of Bones stood the Scourge's lair, Icecrown Citadel.

To the west stood the Cathedral of Darkness, belonging to the Cult of the Damned, devotees loyal to the Lich King. In terms of appearance alone, these cathedrals of the death-worshipping Cult of the Damned might have been the most towering and magnificent churches in Azeroth.

To the east lay Malykriss: The Vile Hold, where the Scourge had raised the Nerubian city of Azjol-Nerub and transformed it into a floating city that spread death.

Thus, the Ashen Verdict, Valiance Expedition, and Warsong Offensive split into three forces, each clearing the Scourge from one of the three locations.

The Ashen Verdict drove straight through the paths opened by the Warsong Offensive and Valiance Expedition, attacking Icecrown Citadel.

As the saying went, heretics were more hateful than heathens. In the eyes of the Valiance Expedition, which followed the doctrines of the Holy Light, the death-worshipping Cult of the Damned of the Cathedral of Darkness was the greatest and most detestable heresy. Thus, under the leadership of Archbishop Turalyon of the Army of the Light, the Valiance Expedition launched an attack on the Cathedral of Darkness.

The attack on Orgrimmar by the Scourge's floating city had happened only half a year ago. To the Orcs, it was