|This article is about the the Space Marine Chapter. For other uses of Exorcist, see Exorcist (disambiguation).|
|Marine||Basic Data||Chapter Symbol|
The Exorcists are a Space Marine Chapter with a very dubious founding history. They were formed as a successor chapter of the Grey Knights at the end of M35, or early M36, in the Thirteenth Founding (The Dark Founding). They have a somewhat worrying creation as they were test subjects for a new form of Daemonhunters. On the subject of the creation, a single communication remains, and was sent from a Genetor-Major of the Xenobiologis core, named Lauram Clelland. 
Members of the Ecclesiarchy were seconded to the Ordo Malleus to help with the creation of the chapter. One member of the delegation, Cardinal Rodrigo Nessun, went mad after witnessing the high rate of failure of the early initiation process, turning to Chaos worship and fleeing with most of the Space Marines that couldn't be successfully exorcised, forming the Swords of Epiphany Chaos Warband.
The Marines of the Chapter underwent a process known as "Daemonic Possession Therapy". Each Marine was, under very tight security, subject to possession by a minor denizen of the Warp. The creature was allowed to remain within the host body for twelve hours until they were cast out by a Daemon Hunter. Some of the Marines were so damaged physically and psychologically that they had to be terminated. Most however survived and needed only minor reconstructive surgery.
After a minor period of recuperation the subjects were taught the ways of combating Daemons, trained in the use of the 666 verses of the Book of Exorcisms and equipped with the weapons of an Exorcist. To test their new creations, the Marines were put into combat on a Daemon World on the northern edge of the Eye of Terror. A squad of the Grey Knights were held in reserve, just in case they turned on their masters, while the Exorcist Space Marines achieved a kill ratio of 97:1. Most impressive, especially against Daemons. Test results showed that their adrenaline production tripled and the levels of serotonin dropped drastically. This made the Marines much more aggressive and gave them increased combat effectiveness. Only 1% of the Marines fell to Daemonic infestation again, but the scientists believed they could eradicate the likelihood of this happening. On the basis that their souls are incorruptible and pure, they are effectively invisible to most warp daemons as their souls do not register for the leak of the mortal corruption. Only extremely powerful daemons are able to spot them.
The Exorcists were involved in the Badab War against rebel Chapters. The Exorcists are also one of only four Space Marine Chapters to have both fought in the Third War for Armageddon and against the Thirteenth Black Crusade.
The Exorcists are a Codex Chapter, though they deviate in a number of key areas. The Chapter numbers twelve companies instead of the standard ten. They maintain two additional Scout Companies to have high influx of neophytes. Without such, the Exorcists will cease to exist due to their highly unconventional training methods.[8a]
Another prominent feature of the Exorcists are the Orisons, specialist cultists who dedicate themselves to particular fields of expertise or knowledge. The most renowned of the Orisons are the Enochian Guard, roughly equivalent to a Chapter's Veteran 1st Company.[8a]
Notable Elements of the Exorcists
- 300-307.M40 — Aschen War: A third of the chapter is lost in the conflict.[8a]
- 143-151.M41 — 12th Black Crusade: The Exorcists were stationed around the Gothic Sector during the Gothic War.
- 901-912.M41 — Badab War
- 972.M41 — Second Company helped Inquisitor Lord Torquemada Coteaz during the Cleansing of Opridia. The victory was achieved with no small extent due to enacting the Rites of Detestation by Librarians of the Exorcists Chapter, and this Rites were unknown outside Chapter.
- 998.M41 — Third War for Armageddon: The Exorcists committed 12 Companies to the defense of Armageddon.
- 999.M41 — Thirteenth Black Crusade: The Exorcists committed 10 Companies against this Black Crusade.
- M42 - The Indomitus Crusade. Took part in the Drennox Cleansing
- Punisher (Battle Barge)
- Redeemer (Battle Barge)
- Eternal Defiance - Strike Cruiser
- Wraith of Threnna - Strike Cruiser
- Hunter - Strike Cruiser
- Enoch Trismegistus — First Chapter Master[8a]
- Silas Alberec — Captain of the 3rd Company[8b]
- Leitz - Captain
- Malachite — Librarian
- Castor Machen — Librarian
- Bael Vordhane - Librarian 2nd Company. Took part in the Indomitus Crusade.
- Sybra — Venerable Dreadnought (KIA)[8c]
Known Named Vehicles
- 1: To Cleanse The Stars by Andy Chambers and Gav Thorpe, pg. 75 (saved archive page, dated Feb 2004, last accessed 12 November 2019)
- 2: Codex: Armageddon, pg. 32
- 3: Codex: Eye of Terror, pg. 16
- 4: Warhammer 40,000: Compendium, The Badab War, by Rick Priestley
- 5: Codex: Space Marines (5th Edition), pp. 27 & 30
- 6: Headhunted (Short Story) — Heroes of the Space Marines (Anthology), pg. 279
- 7: White Dwarf 101 (UK) "Index Astartes: The Badab Uprising" by Rick Priestley, reprinted in Warhammer 40,000 Compendium
- 8: Imperial Armour Volume Ten - The Badab War - Part_Two
- 9: Imperial Armour Volume Two - Second Edition, pg. 22
- 10: Battlefleet Gothic - 2002 Annual, pg. 71 - To Cleanse the Stars
- 11: The Death of Antagonis (Novel), Chapter III.
- 12: White Dwarf July 2019 - Indomitus Crusade Fleets
- 13: - Details of the Third War for Armageddon Worldwide Campaign saved archive page, dated 28 Aug 2003, last accessed 12 November 2019
- http://uk.games-workshop.com/campaignweekends/assets/badab-war-rules.pdf (link removed, accessed 2006.12.11)
- GW Campaign Weekends Site. GW UK's Campaign Weekends Badab War Rules (.pdf)
- Imperial Armour Volume Two - Space Marines and Forces of the Inquisition, pg. 91