At the end of the Horus Heresy and further on into the Great Scouring, the Kharybdis saw extensive use on both sides of the conflict. As the Loyalist Legions hounded their traitorous brothers from warzone to warzone, entire fleets burned in void battles in which the lives of countless thousands more Astartes lost their lives. At the end of the Great Scouring, hundreds, possibly even thousands of Kharybdis served the Astartes faithfully, and in so doing began to develop certain characteristics for which it too would become infamous in the ranks of Loyalist and Traitor alike.