Chaos Knights - Notable Chaos Knight Houses: House Ærthegn - Accepted amongst the ranks of the Imperial Knight houses by the writ of Horus, and treated by their peers with disdain and wary hostility, the Knights of House Ærthegn were masters of the marauder's bloody trade. Following the Archtraitor's defeat, House Ærthegn was driven along with the rest of the Traitor Legions into the Eye of Terror, where they remain to this day. They serve Chaos Undivided.House Arcanus - House Arcanus is a Renegade Knight house that fell to the service of Tzeentch and was among the forces in service to the Changer of Ways that successfully invaded the Stygius Sector, during the Stygius War.House Atrax - Founded sometime during the Age of Strife and rediscovered during the Great Crusade by the dour Mechanicum Tech-adepts of the Forge World of Cyclothrathe in the latter 30th Millennium, this unfortunate Knight house from the world of Arrian was forced into indentured servitude in accordance with the Sidon Protocols. These unfortunate circumstances led to House Atrax's tragic fall during the Horus Heresy. At the end of this tragic conflict, House Atrax, along with the rest of the Traitor Legions, were driven into the Eye of Terror. House Atrax served Chaos Undivided.House Caesarean - During the Horus Heresy this Knight house threw their lot in with the Traitor forces of the Warmaster Horus. Notably, they took part in the Battle of Tallarn as part of the first Traitor reinforcements and provided support to the Legio Krytos. During that campaign they faced the Loyalist Legio Gryphonicus Titan Maniples in Tallarn's southern polar regions.House Chromatic - House Chromatic is a Renegade Knight house that fell to the service of Tzeentch and was among the forces in service to the Changer of Ways that successfully invaded the Stygius Sector, during the Stygius War.House Devine - House Devine fell under the sway of Slaanesh, and was the first of the Knight houses to betray the Imperium of Man and the Mechanicum. On the planet of Molech, the sudden defection of House Devine proved to be the pivotal factor in the defeat of the Loyalist forces seeking to halt Horus' relentless advance on Terra. At the end of this tragic conflict, filled with righteous indignation, a combined strike force of Knights from Houses Cadmus, Terryn and Borgius annihilated the turncoats of House Devine as Imperial forces reclaimed Molech.House Drakon - During the dark days of the Occlusiad War, in 550.M37, for the first time in thousands of Terran years, a knightly house betrayed its oaths of loyalty, joining the Apostles of the Blind King to cause ruinous destruction across the northwestern fringe of the Milky Way Galaxy. Though the Blind King's rogue Tech-priests were eventually defeated, the traitorous Knights of House Drakon remain unaccounted for.House Drear - House Drear is a Renegade Knight house that fell to the service of Nurgle and was among the forces in service to the Plague God that successfully invaded the Realm of Ultramar during the Plague Wars.House Felcarn - There is little information on this formerly loyal knightly house in Imperial records. It is said that House Felcarn became corrupted from within by Chaos. Rumours state that a single surviving member of that family somehow escaped the subsequent Inquisitorial purges, proving his innocence, and went on to prove himself as the Freeblade known as "Penitent Blade," through his tireless efforts to rid his world of the Chaos Cults that plagued it. House Felcarn served Chaos Undivided.House Gotrith - House Gotrith is a Knight house that betrayed the Emperor during the Horus Heresy and provided support to the Legio Mortis during the Battle of Beta-Garmon.House Herpetrax - The Herpetrax are considered an Iconoclast house, and they have served the powers of Chaos for many centuries. House Herpetrax is one of the few members of the Questor Traitoris to have never served the Imperium of Man in any form, having remained independent since the Age of Technology when their world was first colonised. Though their homeworld of Jedathra was invaded by an Imperial force in the 36th Millennium, the Chaos Knights' strong connection to the Ruinous Powers provided them the strength to throw back the Imperial troops and maintain their independence. Since that time, the Chaos Knights of House Herpetrax have proved to be a thorn in the side of the Emperor's realm.House Hyboras - House Hyboras is a Renegade Knight house that repudiated its oath of loyalty to the Imperium of Man during the Horus Heresy. It provided support to the Legio Vulpa during the Battle of Beta-Garmon.House Hydrax - House Hydrax is a Knight house that betrayed the Emperor and joined the Warmaster Horus' forces during the Horus Heresy. Later in that conflict they fought alongside House Medusos against the Loyalist Knights of House Chimaeros and House Draconis of the Knight World of Adrastopol led by their High King Rhoderic Chimaeros. House Hydrax served Chaos Undivided.House Ioeden - House Ioeden is a Renegade Knight house formerly of the Questor Mechanicus that repudiated its oath of loyalty to the Mechanicum and the Imperium of Man during the Horus Heresy. It provided support to the Legio Vulpa during the Battle of Beta-Garmon.House Ju'll - There is little information on this formerly loyal knightly house in official Imperial records or from what world they originally hailed from. All that is known is that they were allied to the traitorous Legio Mortis Titan Legion. Its fate is unknown. House Ju'll served Chaos Undivided.House Korvax  - House Korvax is an Infernal house of the Dark Mechanicum in service to Be'lakor, the first Daemon Prince of Chaos Undivided, and a splinter of the Loyalist House Raven corrupted by the Dark Master during the Charadon Campaign of the Era Indomitus. From their mist-wreathed keeps on the penumbral Fallen Knight World of Korvosi, the Chaos Knights of House Korvax spread the dark corruption of Chaos.House Khomentis - House Khomentis is a Renegade Knight house of Chaos Knights and an Infernal house in service to the Dark Mechanicum. Though once loyal to the Imperium, the house's homeworld of Matarakh was struck by a daemonic invasion in the 33rd Millennium. During this time House Khomentis was turned to the service of Chaos and the Dark Mechanicum. Its Fallen Nobles are most famous for actively seeking out daemons in the hope of becoming possessed and further corrupting their Knight to the service of the Dark Gods.House Khymere - House Khymere is a Renegade Knight house of Chaos Knights. The Khymere are considered an Iconoclast house, though for thousands of years they were staunchly loyal to the Imperium. After the opening of the Great Rift in the late 41st Millennium House Khymere was corrupted to the service of Chaos when its homeworld was unexpectedly attacked by a force of the Indomitus Crusade, whose Space Marines claimed Chaos-corrupted House Khymere Knights had been attacking Imperial worlds. Unwilling to make war against the Imperium they had so long defended, the entire house fled into the Warp Storms of the Great Rift. Their exposure to the empyrean energies of the Warp corrupted many of the Khymere Knights, who returned to realspace filled with hatred for those they felt had betrayed them. Unknown to the Chaos Knights, their travels in the Warp had also displaced them in time. The Renegade Knights had been thrust into their own past, unleashing the very attacks that had led to the Imperial assault that resulted in their damnation.House Kepsydra - House Kepsydra is a Renegade Knight house that repudiated its oath of loyalty to the Imperium of Man during the Horus Heresy. It provided support to the Legio Krytos at the Battle of Beta-Garmon.House Lucaris - House Lucaris is a Renegade Knight house of Chaos Knights. Of all the Iconoclast houses of the Renegade Knights, there are none more bold nor tenacious than House Lucaris. They have waged multiple barbaric campaigns against the Imperium, butchering those who fight in the Emperor's name in all corners of the galaxy, and over the course of ten thousand Terran years have reaped a toll of carnage too high for any single scriptorum to record. They have been called the "House of Serpents," the "Fanged Knights" and many other names, but are always synonymous with terror.House Makabius - Transformed by the century-long civil war that had engulfed their homeworld of Baroda in the Grail Abyss, House Makabius was always known for its bellicose temper, and some would even say avarice and recklessness. Makabius served Mortarion the Reaper, Primarch of the grim Death Guard Legion, during the Horus Heresy. At the end of that tragic conflict, House Makabius, along with the rest of the Traitor Legions, were driven into the Eye of Terror.House Mandrakor - An intermittent passage through the Great Rift was discovered in the early 42nd Millennium, yet it brought little hope to the Imperium. The Cicatrix Maledictum had at least one gap, although others were reported but not confirmed. The passage was near the Eye of Terror, which had been avoided by Navigators since the Great Crusade, for Warp Storms and strange anomalies had always made the region too dangerous to travel. There, when the swirling nebula lulled, was revealed the Nachmund System, near to Agripinaa on the near side of the rift. The Tyrant King of its primary world, High King Kaligius, ruled over a House of Renegade Knights on the world of Dharrovar that had not been seen since the Horus Heresy. Claiming Old Night had returned to plague the galaxy once more, Kaligius rejected communications from the Imperium, instead making pacts with Renegades and pirate fleets. Some starships have run the Nachmund Gauntlet successfully, but many more have been destroyed attempting the journey -- the ruined hulks of innumerable craft hang suspended in space as a voidship graveyard.  In order to end their threat to the Imperium, Lord Commander Guilliman has launched a long campaign to seize the Nachmund System, and House Mandrakor are currently defending Dharrovar from an invasion by the Imperium's forces. However, only Kaligius' most loyal Knights followed him into treachery against the Emperor and a civil war has now broken out within House Mandrakor.House Morbidia - House Morbidia started its existence as one of the very first Knight households in service of the Omnissiah's priesthood on Mars and was one of the early rivals of the legendary Knights of Taranis and House Zavora. Yet where these Houses were to rise high in the esteem of the Martian priesthood, House Morbidia would fall in disgrace; sparking an internecine war that would see it defeated and shackled to the will of the Fabricator-General. Its final fate is unknown. It served Chaos Undivided.House Mordred - House Mordred is a Renegade Knight house formerly of the Questor Mechanicus that repudiated its oath of loyalty to the Mechanicum and the Imperium of Man during the Horus Heresy. It provided support to the Legio Suturvora during the Battle of Beta-Garmon.House Medusos - House Medusos is a Knight house that betrayed the Emperor and joined the Warmaster Horus' forces during the Horus Heresy. Later in that conflict they fought alongside House Hydrax against the Loyalist Knights of House Chimaeros and House Draconis of the Knight World of Adrastopol led by their High King Rhoderic Chimaeros. House Morbidia served Chaos Undivided.House Mykorphas - House Mykorphas is a Chaos Knight house that serves the Plague God Nurgle. As a result of this allegiance, the Mykorphas Fallen Nobles have seen their Knights Despoiler become slowly coated in living rust.House Niagma - House Niagma is a Renegade Knight house formerly of the Questor Mechanicus that repudiated its oath of loyalty to the Mechanicum and the Imperium of Man during the Horus Heresy. It provided support to the Legio Vulpa during the Battle of Beta-Garmon.House Oroborn - House Oroborn was a Questor Mechanicus Knight house that turned Renegade during the Horus Heresy and provided Knight support to the Legio Mortis at the Battle of Beta-Garmon.House Perdaxia - There is little information on this formerly loyal knightly house in official Imperial records or from what world they originally hailed from. During the outbreak of the Horus Heresy, they answered the call of the mad Archmagos Inar Satarael, and willfully took part in the Invasion of Paramar V. They also provided Knight support to the Legio Fureans at the Battle of Beta-Garmon. House Perdaxia served Chaos Undivided.House Rajha - There is little information on this formerly loyal knightly house in official Imperial records or from what world they originally hailed from. During the outbreak of the Horus Heresy, the ghost-grey Knights of House Rajiha answered the call of the mad Archmagos Inar Satarael, and willfully took part in the Invasion of Paramar V and the Battle of Beta-Garmon where they provided Knight support to the Legio Fureans.House Senica - There is little information on this formerly loyal knightly house in official Imperial records or from what world they originally hailed from. All that is known is that they were allied to the traitorous Legio Mortis Titan Legion. House Senica served Chaos Undivided.House Slughorn - House Slughorn is a Renegade Knight house that fell to the service of Nurgle and was among the forces in service to the Plague God that successfully invaded the Realm of Ultramar during the Plague Wars.House Thryn - House Thryn hails from a savage world where the only law is that of the blade, and thus every Knight Despoiler in their ranks wields a Reaper Chainsword, as melee combat is a requirement for their Knights.House Turbidos - House Turbidos was a Renegade Knight house that participated in the Battle of Beta-Garmon during the Horus Heresy and provided support for the Legio Tempestus.House Vextrix - House Vextrix was a Questor Mechanicus Knight house that turned Renegade during the Horus Heresy and long provided Knight support to the Legio Mortis, including at the Battle of Beta-Garmon.House Vorran - House Vorran is home to Zir Gedrim the Mahj, the Fallen Noble pilot of the Chaos Knight Sorrowsworn.House Vrachul - House Vrachul is a Renegade Knight house of Chaos Knights and an Infernal house in service to the Dark Mechanicum. Sometime after the Great Rift's creation during the Era Indomitus, Vrachul was among the the Chaos forces that invaded the Talledus System, precipitating the Talledus War. Due to pacts made with the Iron Warriors Warpsmith Etrogar, House Vrachul and the Chaos Knights of House Khomentis aided the Iron Warriors in their invasion of the Fortress World of Ghreddask in the Talledus System.House Vyridion - House Vyridion was a household of Imperial Knights native to the world of Highrock that existed at the foundation of the Imperium of Man. Through treachery and to their ever-lasting shame, House Vyridion broke its vows of fealty to the Imperium and joined the forces of the Warmaster Horus Lupercal. Yet, House Vyridion recognised the error they had made and broke all ties with their former allies. House Vyridion was called upon by the Emperor's own bodyguard, the Legio Custodes, to fight alongside them in defence of the Imperial Webway Project in the dungeons of the Imperial Palace.House Xerathon - House Xerathon was a Questor Mechanicus Knight house that turned Renegade during the Horus Heresy and provided Knight support to the Legio Mortis at the Battle of Beta-Garmon.House Wyvorn - Once a loyal House of Imperial Knights from the proud Knight World of Adrastapol, House Wyvorn is now a mere footnote in Imperial history, the entire House having been declared reductum hereticum extremis by the High Lords of Terra following their betrayal during the Donatos Uprising. House Wyvorn served Chaos Undivided.Rusthounds - The Rusthounds are a Renegade Knight house in service to the Plague God Nurgle who are all former members of House Krast, a Questor Mechanicus House long in service to the Adeptus Mechanicus.