Icecrown CitadelIntroduced in Wrath of the Lich King
Icecrown Citadel dominates Northrend - visible from farther away than nearly any other structure and home to the greatest army of undead in the known world. Inside dwells the Lich King - a tyrant with nearly godlike power over his tireless, seemingly infinite subjects - and the will to bring Azeroth to its knees.
An assault on the mighty citadel is among the most dangerous undertakings in the history of Azeroth - and the most pivotal. The legendary heroes Highlord Tirion Fordring of the Argent Crusade and Highlord Darion Mograine have joined forces to lead the charge through Icecrown's fortified gates, and both the Horde and Alliance have sacrificed lives - indeed, whole battalions - to get this far. They dare not fail. The Lich King's reign must end.