Warcraft III: The Frozen Throne
Released in July 2003 PC / MAC Expansion Set
While the armies of humans, orcs, and their allies recovered from their battle against the Burning Legion, Arthas Menethil - now a Death Knight - slaughtered the living denizens of Azeroth's Eastern Kingdoms in the name of the Scourge. But new forces emerged that threatened to destroy Arthas and his minions: the banshee Sylvanas Windrunner rebelled, creating a splinter faction of undead known as the Forsaken, and the demon-tainted night elf Illidan Stormrage sent his armies to the icy continent of Northrend to strike at the Lich King. Arthas rushed to his master's defense and defeated Illidan, who fled to Outland in shame. At last close to the seat of the Scourge's power, Arthas did the unthinkable, and willingly merged his own spirit with that of the Lich King.