During the Age of Chaos, the Grymdar's magmahold of Karadrum was taken by the armies of Chaos and its Runefather was slain. The refugees chose a new leader named Hermdar-Grimnir, who was the greatest Karl among them. He led them to retake their lost kingdom, slaying every one of the Skaven and Chaotic enslavers who had destroyed it. Damaged beyond repair by the fighting, Hermdar-Grimnir ordered the mountain buried under magma.
Age of Sigmar
They destroyed the prison fortress of Blackiron while also embarking upon the grueling Cracked Plain campaign to end the gut-tyranny of Thogbrute for shockingly low payment. Among the tribes near the Adamantine Chain they become known as the Slayers of Tyrants.[1b]