Both the armour and clothing of the hold are blackened with soot, ash covering their hair and beards – many wear masks. They are a mournful people, often given to singing dirges and skilled in the art of stealth.
They are named after their god, Gazul who had fought Nagash in Age of Myth and lost, inhabiting the ancient ruins of a once glorious cavern-city built around the ancient Oasis of Gazul – Gazul-Baraz.
In the Age of Sigmar they were contacted by Stormcast Eternals led by Lord-Aquilor Sathphren Swiftblade, offering them an alliance to defeat the Keeper of Secrets Amin'Hrith who had tormented them for centuries. In exchange, they would assist in finding Caddow and the Corvine Gate.
The Stormcast lured the Greater Daemon to the heart of the city and smashed the ruby holding the soul of their last prince. The rune-singers were then able to raise him and other dead duardin to attack and destroy it. 
Rune-Singers: An ancient priesthood that wards the souls of their dead, and can even in extremis call them back to assist the living. They sing the souls of the dead to their god, who seems to still exist. 
- Elder Judd: War-Mourner of the Gazul-Zagaz. 
- Elder Gnol-Tul: He led his kinband to the ruin of the city of Caddow to aid Lord-Aquilor Sathphren Swiftblade [2a]
- 1: Sacrosant & Other Stories (Anthology): Hallowed Knights: A Dirge of Dust and Steel
- 2: Hallowed Knights: Black Pyramid
- 2a: Chapter One