What is Frostmourne

Frostmourne is the runeblade that Ner'zhul, the Lich King, thrust from his Frozen Throne, intending that Arthas Menethil – his unwitting potential host – would discover it on the continent of Northrend. It is currently wielded by Arthas, the Lich King, who will be starring in the next World of Warcraft Expansion titled Wrath of the Lich King.


History of Frostmourne

Muradin Bronzebeard, a dwarven explorer last seen in Northrend, had heard of Frostmourne's power and was searching for it when Arthas and his men arrived. When the forces of the Dreadlord Mal'Ganis began to close in around them, Arthas and Muradin set out to claim the weapon.

Frostmourne was guarded by several revenants who tried to warn Arthas of the danger, but he destroyed them regardless.

After killing Muradin, Arthas returned to his base and staged a counterattack against Mal'Ganis, quickly destroying the dreadlord's base. The dreadlord confronted Arthas, telling him that Ner'zhul had known he would take the cursed sword. He spoke as if he believed Arthas was now on his side. To the demon's surprise, Arthas used the runeblade to slay the dreadlord at the Lich King's command.