The Frostborn are a group of dwarves native to Northrend. Upon encountering the Explorers's League, the Frostborn combined their own knowledge with that that of the Explorers' League. The Frostborn are led by Yorg Stormheart, a mighty dwarf with amnesia that was found by the Frostborn. Yorg eventually recovers his memories and learns his real name is Muradin Bronzebeard. When Arthas first became the Lich King, Muradin Bronzebeard was there. During the ensuing battle, Muradin was knocked unconscious and lost his memories.