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Created during the Second Founding alongside the Black Templars and Crimson Fists, the Excoriators are known as attrition fighters and stubborn to the extreme. The first Chapter Master of the Excoriators was the Imperial Fist Captain Demetrius Katafalque.[2d] Their "survival no matter the odds" mentality stems from the dark days of the Horus Heresy itself. The Marines who would eventually become the Excoriators were stationed on the walls of the Imperial Palace by Rogal Dorn himself with one order: Do not lose.[Needs Citation]
Although it is unclear if this is the Chapter's motto, the Excoriators still fight as if their Primarch himself was expecting them to hold the line.
During the War of the Beast, the Excoriators were one of the Successor Chapters of the Imperial Fists to answer the "Last Wall" Protocol, a meeting in the Phall System that would see the Fists and their successors combine once more into a Legion.
The Excoriators are known to contain a flaw in their Gene-seed, particularly the Catalepsean Node,[2c] known as The Darkness. Outwardly, The Darkness appears as a wretched palsy, slackness of the jaw, tremor of the limb and a blankness of the eye.[2a] However, to Excoriators who have experienced it, it is described as a sleeping wakefulness or a living nightmare; that while afflicted, they relive one of Dorn's darkest moments, the loss of the Emperor.[2b] Excoriators who become afflicted with the Darkness are cared for by the Santiarch.[2c]
- The War of the Beast. The Excoriators meet with other Imperial Fists successors per the "Last Wall" Protocol. During the conflict, the Excoriators contributed a portion of their strength to rebuild the Imperial Fists.
- Thirteenth Black Crusade. The Excoriators fielded eight companies against the forces of chaos in this campaign.
- Certus-Minor. The Excoriators' Fifth Company was wiped out battling the Cholercaust; Zachariah Kersh, Corpus-Captain of the 5th, was the only survivor.[2e]
- Zachariah Kersh — Current Chapter Master
- Issachar — Chapter Master during the War of the Beast
- Saul Abramach — Became a member of the rebuilt Imperial Fists during the War of the Beast
- Dathan Tychor — Became a member of the rebuilt Imperial Fists during the War of the Beast
- Demetrius Katafalque — First Chapter Master
- 1: Codex: Eye of Terror p. 16
- 2: Legion of the Damned (Novel) by Rob Sanders [Needs Citation]
- 3: The Emperor Expects (Novel) Chapter 14
- 4: Shadow of Ullanor (Novel) Chapter 3