House Ærthegn, known also by their cognomen The Wræken Dreor, were a Traitor Knight Household loyal to Warmaster Horus during the latter years of the Great Crusade and the Horus Heresy in the late 30th and early 31st Millennia. Accepted amongst the ranks of the Imperial Knight Households by the writ of Horus, and treated by their peers with disdain and wary hostility, the Knights of House Ærthegn (lt: Ay-er-thay-en) were masters of the marauder's bloody trade. Striking unannounced and with overwhelming force, the stark black machines of these border reavers hunted with brutal efficiency first for their own ends, and later under the authority of the Warmaster's command, placing no value on honour duels or other Knightly ideals which have been for so many centuries the cornerstone of a Knigh