The Black Thorns are 10th founding chapter descended from the Iron Hands. This battle- hardened chapter's first duty as a chapter was watching over the volatile Infernus Sector, known for it's proximity to a Minor Warp rift known as the Fracture. The High Lords of Terra feared that the Fracture would one day serve as a gateway for the forces of Chaos, and their fears were justified when the Fracture unleashed a horde of Daemons upon the Black Thorns' homeworld of Lorem. The young chapter barely managed to defeat the Daemons, loosing more than three quarters of it's forces in the process. But from that day forward, the Black Thorns became known as the heartless warriors they are now, believing that the cold, hard strength of steel shall always triumph over the Ruinous Powers.