World of Warcraft: Wrath of the Lich King - Fall of the Lich King

Patch 3.3.0: Fall of the Lich King is a content patch that included the Icecrown Citadel raid as well as its three 5-player dungeon wings in the Frozen Halls. Patch 3.3 was the last major patch before the release of World of Warcraft: Cataclysm. Undocumented changes can be found at Patch 3.3.0 (undocumented changes).