Arcana Sector

**This article, Arcana Sector, was written by Phoenix Arcanum. It may be linked to any page without asking for the author's permission.**

## Sector

### **Segmentum**

Segmentum Ultima

The **Arcana Sector** is a sector of Imperial space located north of the Galactic Core Region in the Ultima Segmentum. The Arcana Sector is made up of seven sub-sectors; Palatine, Celtic, Hyporia, Furoris, Arixus, Tyber, and Svaros.

Beyond the borders of the Imperium's domain lay the Cernunnos Expanse, a large region of unexplored space inhabited by a myriad of horrors which constantly threaten to encroach on Mankind's dominion. Kasterous and Charlemagne are two other Imperial Sectors that border the Cernunnos Expanse, though to reach them one must either attempt to travel through the Expanse or "go around."

The rulership of the Arcana Sector falls into the hands of the Arcana Sector Authority (also known as the Arcana Sector Council, the Overcouncil of the Arcana Sector, or the Council of Coronarius). The Council is headed by the Sector Governor (traditionally styled Governor-General) and made up of Delegates from various Imperial institutions across the Sector. These Delegates include emissaries from each Sub-Sector, the Imperial Guard, Battlefleet Arcana, the Iron Spears Space Marine Chapter, the Sororitas Order of the Gilded Rose, the Adeptus Mechanicus (represented by Forge World Beltane), the Questor Imperialis, the Administratum Sector Offices, the Astra Telepathica, the Ecclesiarchy, the Inquisition, the Adeptus Arbites, and many others

For Millennia, the Imperial Governor of the Arcana Sector has hailed from the "Maximus Dynasty", beginning with Governor-General Zoticus Maximus.

The main threats to the Arcana Sector include; the Void Stalkers Heretic Astartes and other Chaos Servants of the Greater Daemon Baphomet, the Mad Skulls Tribe of Orks, the Drukhari Kabal of the Bleeding Heart, the Tyranid Hive Fleet Leviathan (Arcana Tendril), the Akaphet Dynasty of Necrons, and the inhuman horrors of the Cernunnos Expanse. Also present within the Arcana Sector is the wandCelticg Aeldari Craftworld known as Feinnwe.

The presence of a Tendril of Hive Fleet Leviathan within the Arcana Sector appears to have attracted a Tendril of Hive Fleet Hydra as well. As has been observed elsewhere, this Hydra Tendril follows the path of the Leviathan Tendril, seeking out defeated splinter fleets and cannibalizing them to gain biomass and genetic information.

To guard against this myriad of threats, the Arcana Sector is dutifully protected by numerous Regiments of the Imperial Guard, Battlefleet Arcana of the Imperial Navy, the Iron Spears Chapter of the Adeptus Astartes Space Marine Chapter, and the Adepta Sororitas Order of the Gilded Rose, at least three Titan Legions (Legio Ferox, Norsca, and Valorum), two Questor Imperialis Knight Houses (Houses Ravenia and Pendragon), two Questor Mechanicus Knight Houses (Houses Vermillion and Orlando), and many other Imperial institutions present within the Sector.

Following the formation of the Cicatrix Maledictum, the Arcana Sector was cut off from the greater Imperium, becoming part of he Dark Imperium. To make matters worse, a warp storm known as the Dolorex Anomaly at the heart of the Cernunnos Expanse expanded significantly, splitting the Expanse in half and separating the Arcana Sector from the Kastorius Sector. The forces of Chaos (primarily the Void Stalkers Traitor Astartes and other servants of the Greater Daemon Baphomet) use the newly-expanded Dolorex Rift to launch ceaseless attacks upon the servants of the Emperor in two Sectors. The Arcana Sector was partially reconnected with the Imperium through Roboute Guilliman's Indomitus Crusade and a single safe passage way through the Dolorex Rift was established.

## Notable Systems and Planets

### Palatine Sub-Sector

* **Coronarius System**
	+ **Ogma:** Arid World. Home to the largest Schola Progenium compound in the Sector
		- **Gideonsberg:** Satellite of Ogma. Home to another Schola Progenium compound
		- **Voltranis:** Satellite of Ogma. Under Inquisitorial control.
	+ **Coronarius:**  Urbanized Hive World that serves as the capital of the Arcana Sector and seat of the Arcana Sector Authority
		- **Diana's Rest**: Satellite of Coronarius. Shrine World and "Nature Reserve"
	+ **St. Rhiannon**: Resplendent blue-green Gas Giant orbited by twenty-two moons. Technically classified as a Shrine World.
		- **Rhiannon IV:** Satellite of St. Rhiannon. Cardinal World. Home to the Shrine of St. Rhiannon and a fortress operated by the Sororitas Order of the Gilded Rose.
		- **Rhiannon VIII:** Satellite of St. Rhiannon. Homeworld of the Imperial Guard Regiments known as the Rhiannon Rangers.
		- **Rhiannon XIII:** Satellite of St. Rhiannon. Civilized World that acts as a Naval Fortress.
		- **Rhiannon XXII:** Satellite of St. Rhiannon. Industrial World.
* **Victora System**
	+ **Medegard:** Forge World. Tech-Priests of Medegard wear dark green robes. Homeworld of the Collegia Titanica Legio Valorum
	+ **Aesari Ultima:** Environmentally-stunning Civilized World. Heavy Astra Telepathica presence.
		- **Satalia:** Satellite of Aesari Ultima. Pleasure World with a large number of nature reserves
		- **Arcaena Magna:** Satellite of Aesari Ultima. Civilized World. Heavy Astra Telepathica presence. Contains an Astropathic Relay Station.
	+ **Liraphelle:** Knight World of House Pendragon
	+ **Victora:** Temperate Hive World and homeworld of the Victoran Legionary Regiments of the Imperial Guard. Nominal Capital of the Palatine Sub-Sector
		- **Morhaven:** Satellite of Victora. Urbanized Hive World.
	+ **Menagerie:** Rocky and stormy Penal World maintained by the Adeptus Arbites. Homeworld of the Menagerie Suicide Brigades. The vast collection of inmates are often put to work extracting valuable ores from vast mineshafts deep below the surface. Much of the material mined from Menagerie is given over to the Forge World of Medegard.
	+ **Panopticon:** Distant Quarantined World home to a massive Inquisitorial Fortress known as the *Arx Vigilans*
* **Alora System**
	+ **Alora Prime:** Gas Giant
		- **Aria Nova:** Seventh moon Alora Prime that was settled by Arian Colonists who fled their original homeworld after it was invaded by the Aetiran Traitor Regiments.

### Celtic Sub-Sector

* **Brigid System**
	+ **San Leix:** Death World dominated by expansive deserts, arid wastelands, and urban sprawls. "Extraurban Wastelands" are inhabited by a number of "post-apocalyptic" techno-barbarian tribes.
	+ **Mundus Viridis:** Highly verdant Feral World. Least developed planet in the Brigid System. Contributes Guardsmen to the Brigid Regimentum.
	+ **Laigin:** Feudal World. Terrain primarily made up of Lakes and Highlands.
		- **Tuath:** Satellite of Laigin. Forested Moon inhabited by "Early Medieval" Humans.
		- **Kildara:** Satellite of Laigin. Human population exists in a perpetual "Industrial Age".
	+ **Brigid:** Highly advanced Civilized World with diverse biomes. Contributes Guardsmen to the Brigid Regimentum.
	+ **Hibernia:** Civilized World dominated by low mountain, moors, and bogs. Contributes Guardsmen to the Brigid Regimentum.
	+ **Ailinne:** A frigid Feudal/Death World that serves as the homeworld of the Iron Spears Chapter of the Adeptus Astartes
		- **Ibrickane:** Satellite of Ailinne. A cold and bleak Feral World home to an "Iron Age" Human society
	+ **Donn:** Distant Dead World/Dwarf Planet home to an infamous Death Cult
* **Tara System**
	+ **Fiacc's Haven:** Shrine World with a tropical environment
	+ **Tara:** Imperial Capital of the Celtic Sub-Sector
	+ **Kern:** Death World marked by thick jungles and foetid swamps. Produces Kernic Hunter Regiments for the Imperial Guard
		- **Gallowglass:** Satellite of Kern, Civilized World.
	+ **Caillech:** Dead World. Home to a Naval Fortress
* **Erist System**
	+ **Erist:** Heavily forested Feudal World. The natives are heavily religious and the culture is heavily tied to the Imperial Cult. Despite being classified as a Feudal World, Erist provides a number of Regiments for the Imperial Guard

### Hyporia Sub-Sector

* **Nordenstar System**
	+ **Muspelgard:** Volcanic Mining/Industrial World. Home to a sizeable colony of Stormcrag Squats.
	+ **Osthaven:** Knight World of House Vermillion, allied with the Tyr Mechanicus.
		- **Osthaven Secundus:** Satellite of Osthaven. Naval Fortress
	+ **Middenmark:** Temperate Civilized World with a climate and environment similar to that of Old Earth.
	+ **Wodinhold**
	+ **New Nordholm:** Frozen Death World that produces Norden Huscarl Regiments for the Imperial Guard. Imperial Capital of the Hyporia Sub-Sector. New Nordholm was colonized during the Great Crusade by Imperial colonists from "Old" Nordholm, a planet located in the Pleiades Cluster in the Segmentum Solar.
		- **Syf:** Satellite of Nordenheim. Home to a fortress operated by the Sororitas Order of the Gilded Rose and an Astropathic Relay Station.
		- **Tyr:** Satellite of Nordenheim. Forgeworld. Tech-Priests of Tyr wear dark grey/black robes. Homeworld of the Collegia Titanica Legio Norsca

* **Tinisar System**
	+ **Dotana:** Arid World
	+ **Gorm's World:** Civilized World. Homeworld of the Gormic Highlander Regiments
	+ **Maranan:** Ocean World. Human Cities are constructed upon artificial islands.
	+ **Tinisar Ultima:** Hive World that serves as the center of Battlefleet Arcana

* **Orinvast System**
	+ **Orinvast Primaris:** Colony World of the Stormcrag Clan
	+ **Orinvast Secundus:** Adopted homeworld of the Stormcrag Clan of Abhuman Squats. The Stormcrag Clan relies upon vast clone-farms for reproduction.
	+ **Orinvast Tertius:** Colony World the Stormcrag Clan

* **Arak System**
	+ **Arak:** Arid, post-apocalyptic Death World and homeworld of the Imperial Guard Regiments known as the Raiders of Arak. The Arak Raiders are composed of numerous Mechanized Regiments. Aside from Armoured Fist and Leman Russ Squadrons, the Arak Raiders are also known to deploy high numbers of Tauros, Tauros Venators, and Attack Bikes. The Arak Raiders specialize in fast hit-and-run tactics and harassment campaigns. Arak Chimeras and Leman Russes are heavily modified to increase their off-road capabilities and maximum speed.

### Svaros Sub-Sector

* **Branwen System**
	+ **Ceridwen:** Civilized World. Heavy Astra Telepathica presence. Home to an Astropathic Relay Station
	+ **Branwen:** Civilized World. Imperial Capital of the Svaros Sub-Sector
	+ **Prydwen:** Naval Fortress
	+ **Arawen:** Dead World with a number of protected Human settlements.

* **St. Morrigan System**
	+ **Scathac:** Arid Civilized World World
	+ **St. Morrigan:** Shrine World with a heavy Ecclesiarchy presence. Unofficial "homeworld" of the Sisters of Battle Order of the Gilded Rose (charged with an eternal vigil over the Arcana Sector).
		- **Boudica's Wrath:** Satellite of St. Morrigan. Dead World. Surface scourged during the Age of Apostasy after the Martyr of Morrigan.
	+ **Seladore:** Pleasure World.
* **Beltane System**
	+ **Caldera:** Mining World
	+ **Kresek:** Barren Industrial World. Home to a number of Mechanicus Enclaves.
		- **Pyth:** Satellite of Kresek. Dead World
	+ **Beltane:**  Principal Forge World and industrial heart of the Arcana Sector. Headquarters of the Collegia Titanica Legio Ferox.
	+ **Radagost:** Hive World
		- **Scaevola's Bastion:** Satellite of Radagost. Knight World of House Orlando, allied with the Beltane Mechanicus
	+ **Vogos:** Dead World. Client of Beltane's Fabricator-General. Home to a Mechanicus Research Station
		- **Govos:** Tiny satellite of Vogos. Glorified listening post

### Arixus Sub-Sector

* **Ozstar System**
	+ **Ozworld:** Mysterious planet of which little is known. Ruled by an immortal "Oz-King".
	+ **Skalvaxus:** Pleasure World
	+ **Ivargraad:** Agri-World
* **Solyria System**
	+ **Mundus Valor:** Homeworld of the Valorian Templar Regiments of the Imperial Guard
	+ **Solyria:** Hive World. Imperial Capital of the Arixus Sub-Sector
	+ **Menti Celesti:** Cardinal World. Home to the *Celestial Basilica*, the seat of an Arch-Cardinal. The Arch-Cardinal of Menti Celesti controls an Arch-Diocese that encompasses the Arcana and Kastorius Sectors. This Arch-Diocese theoretically includes the Cernunnos Expanse.

* **Vex System**
	+ **Primaris Vex:** Civilized World. Settled after the *Vexian Xenocides*
	+ **Mundus Vex:** Agri-World. Settled after the *Vexian Xenocides*
	+ **Concord Vex:** Civilized World. Settled after the *Vexian Xenocides*
	+ **Omega Vex:** Naval Fortress. Settled after the *Vexian Xenocides*

### Furoris Sub-Sector

* **Atlas System**
	+ **Pulux:** Mining World
		- **Serex:** Industrial World
	+ **Alpha Zenith:** Knight World of House Ravenia
	+ **Foralindon:** Civilized World and Naval Fortress
	+ **Atlas:** Frigid and Mountainous Fortress World. Homeworld of the Atlesian Paladin Regiments of the Imperial Guard
* **Axios System**
	+ **Assiah's Crown:** Fortress World
	+ **Gehenna's Throne:** Fortress World
* **Hesperis System**
	+ **Hesperis Dawn:** Civilized World. Imperial Capital of the Furoris Sub-Sector
	+ **Hesperis Twilight:** Naval Fortress and Astropathic Relay Station.
* **Ixon System**
	+ **Ixon:** Quarantined Dead World home to an Inquisitorial Fortress of an unknown Ordo. Formerly a Civilized World prior to the *Ixon Cataclym*.
* **Aria System**
	+ **Aria IV:** Bleak Civilized World invaded by Aetiran Traitor Regiments in 815.M41. The Aetirans established Aria IV as their primary defensive Bastion against Imperial Loyalists. Aria IV was finally liberated in 827.M41 by the Konigrad Warhost after twelve years of intensive warfare.
		- **Anya's Tear:** Moon of Aria IV and Armoury World of the Departmento Munitorum. After the invasion of Aria IV, the Arian PDF was forced to fall back to Anya's Tear. The Arian PDF attempted to use the weapons stored there to hold off the Aetrians until Imperial reinforcements could arrive. During the Battle of Aria IV, Militarum High Command established a base on Anya's Tear and used the moon to launch attacks against the Aetrians on the planet above.

### Tyber Sub-Sector

* **Konigrad System**
	+ **Gorinvar:** Naval Fortress
	+ **Hesagrim:** Mining/Industrial World
	+ **Konigrad:** Cold and grim Hive World/Death World that is the Imperial capital of the Tyber Sub-Sector as well as the homeworld of the Imperial Guard Regiments known as the Warhost of Konigrad. The grey and inhospitable surface consists of expansive mountain ranges and wide rocky valleys teeming with death. Sky exists in a perpetual overcast and most flora appears to be on the brink of death. Konigrad's population of 150 billion is confined to 12 Hive Cities. The grim and regimented way of life cultivated on Konigrad transfers into the Regiments it produces. Kyron Guardsmen are grim and unflinching, with absolute devotion to the God-Emperor of Mankind. While the Regiments of the Warhost of Konigrad vary greatly in their composition, most of them excel in the art of siege warfare.
	+ **Dormstag:** Penal/Dead World under the control of the Adeptus Arbites. Homeworld of the Dormstag War-Thralls Penal Legion.
* **Vernaris System**
	+ **Sadritha:** Ash-covered Industrial World with extremely alien flora and fauna. In the 42nd Millennium, Necron Tombs belonging to the Akaphet Dynasty began to awake beneath the surface of Sadritha. The Factorum-City Zeta Primus was the first settlement to be attacked by newly-awakened Necrons.
		- **Telmara:** Satellite of Sadritha. Home to an Astropathic Relay Station.
	+ **Vernaris:** Civilized World
	+ **Dressen:** Agri-World

### Cernunnos Expanse

* **Venator System**
	+ **Venator IX:** War World that serves as the Arcana Sector's bulwark against the horrors of the Cernunnos Expanse. Venator IX was the first planet claimed by the First Cernunnos Crusade in 827.M41 and it has been besieged by all the enemies of Mankind ever since.

* **Kilandros System**
	+ **Kilandros:** Within the Cernunnos Expanse lays Kildandros, an arid Ork World that is the original homeworld and "kapital" of a colossal Orkish tribal confederation known as Da Great Horde. The planet appears to be a sort of holy place for "Da Horde" as every time the Ork population of Kilandros is reduced to null, Orks of Da Horde from distant worlds migrate and recolonize the planet. This fact combined with the lack of constant supply lines so deep in the Cernunnos Expanse has made it impossible for the Imperium to fully exterminate the Orks of Kilandros.
		- **"Da Great Rok":** Satellite of Kilandros. In the early 41st Millennium the Mad Skulls Tribe attempted to convert the planetoid into a massive "Attack Moon" and crash it into Holy Terra. The Orks' plans were stopped during the Battle of Da Great Rok where the nearly complete "battle station" was permanently immobilized. Presumably, the next group of Mad Skull Orks to settle on Kilandros presumably stripped the moon of its machinery and used its scrap to build a ramshackle fleet.
* **Bucephalus System**
	+ **New Alexandria:** Colony World of Xyonite Abhumans and Crownword of the Necron Akaphet Dynasty. While the rest of the Akaphet Dynasty began to awaken sometime before 800.M41, the Necron Tombs of New Alexandria only began to awakenen in final days of the final century of the 41st Millennium.
* **Atanax System**
	+ **Atanaxes:** Tomb World of the Necron Akaphet Dynasty. Atanaxes was the site of a battle during the Cernunnos Crusade's fourth year in 831.M41.
* **Askor System**
	+ **Askor:** Radioactive homeworld of the militaristic Lesser Xenos race known as the Lekad. An ancient nuclear war caused the Lekad to devolve into hideous masses of mutant flesh cybernetically-fused into man-sized, tank-like war machines. The Lekad wage an endless war to exterminate all non-Lekad life from the Galaxy
* **Santor System**
	+ **Santor:** High-gravity homeworld of Abhuman Ogryns. Local Ogryns enslaved by the Stormcrag Exiles.
		- **Orinvast Nova:** Moon of Santor and center of a Chaos Cult of Stormcrag Exiles that were banished from their home following their corruption.
* **Skaevax System**
	+ **Skaevax:** Originally home to the silicon-based Lesser Xenos race known as the Skaevos. The Skaevos developed humanoid war-machines fitted with Abominable Intelligence. These machines became corrupted by the Chaos influence of the Dolorex Anomaly and slaughtered their creators. The "new race of Skaevos" waged a ceaseless war to wipe out all organic life in the Galaxy.