Anub'arak gave Anub'Rekhan an absolute order: the Scourge forces marching south had to take Drak'Tharon Keep and conquer the entire empire of Zul'Drak.
The undead army of Icecrown Glacier was not as powerful as it appeared. It urgently needed a large empire to provide the Scourge with a steady supply of troops.
The Lich King's objective was clear. Before the Cult of the Damned spread the plague throughout Lordaeron, he wanted an undead army capable of steamrolling Lordaeron's land forces.
As King Anub'arak's most trusted Crypt Lord, Anub'Rekhan had gathered almost every elite undead soldier in Icecrown Glacier for this campaign against Zul'Drak. He intended to crush the defenses of Zul'Drak's Drakkari trolls in a single blow.
But judging by the battle so far, the situation was far from promising.
The Lich King's own troops, descendants of the Arathor Empire's colonists, had been depleted in the war against Azjol-Nerub. The undead reinforcements available from Azjol-Nerub were limited. Besides, the Scourge had yet to bring all of Azjol-Nerub's subterranean kingdom under its control.
Deep within Azjol-Nerub's subterranean kingdom, more than a hundred separate forces still resisted the undead army's encroachment on the entire nerubian race.
The Lich King had simply pulled himself out of the quagmire of war in the underground Kingdom and turned his sights on the surface world.
The invasion of Zul'Drak had been a long time in the making. The Lich King had committed enormous manpower to excavating the fortress foundations in the Underground World, then used up hundreds of nerubian engineers to build the undead fortress known as Naxxramas.
Anub'Rekhan could not afford to fail. Whether it was the Lich King or King Anub'arak who passed judgment, defeat would mean the annihilation of his very soul.
Those damned trolls had actually drained the life force from those