Macer Varren served as a Captain of the 12th Company of the feared and deadly XIIth Legion of Space Marines, the World Eaters. Involved in the bloodiest assaults and most vicious battles of the Great Crusade, Varren helped to contribute to the World Eaters' reputation for bloodshed and the propagation of fear on a mass scale. Varren was a warrior who bore the scars of countless conflicts upon a chiselled, granite-hard face. The stiff lines of Macer Varren's features mirrored those of other Veteran Astartes who had known a lifetime of war. Varren wore a tight cowl of dark hair and usually sported a ragged beard.