Ghal Maraz, which means "Skullcrusher" in Kazalid, known to the people of the Empire as the "Hammer of Sigmar" is a powerful rune weapon, according to legend, created by the runesmith Skalf Blackhammer for the High Kings of Karaz-a-Karak. Several centuries later, High King Kurgan Ironbeard gave it to the Unberogen warrior Sigmar, who rescued him from Orc captivity.