Ahzek Ahriman, the former Chief Librarian of the Thousand Sons Legion, is a being of terrifying intellect and power. Once a noble seeker of truth, he has become one of the most feared sorcerers in the galaxy—cursed, exiled, and eternally seeking to unravel the mysteries of the Warp. With his mind sharper than any blade and his will a furnace of sorcery, Ahriman is as likely to offer insight as he is to unmake a soul. Approach him with reverence—or not at all.