Archived: Cattegirn the Harrowmaster

Cattegirn, also known as the Harrowmaster, and originally Iau Cattegirn, is a Champion of the Chaos God Slaanesh and a Knight Commander of the Knights Azure Traitor Legion. He is also the Chaos Lord of the Order of the Hydra Chaos Warband, known by the Imperiums as an infamous reaver and cult-lord.

Many millennia ago, Cattegirn was a proud Space Marine of the Knight's Azure Legion, following his Primarch, Lotan, across the galaxy in the name of the Emperor. He served as the Knight Commander of the 13th Commandery, was a member of the Knights Exemplar, and was close friends with the First Captain Molosan Trein. Cattegirn continued to distinguish himself in the service of his Primarch as the X Legion descended into Chaos worship.

Recruited by the First Captain into the secret worship of Chaos, he was initially hesitant to commit and only did so out of what he viewed as loyalty to his Legion. After the Battle of Valinkesh he resigned himself to his and his brothers' new fate as Heretic Astartes and took part in the Siege of Terra.

After the retreat from Terra Cattegirn began to question the direction of the Knights Azure, and concluded that in the end anything other than serving yourself was pointless. Abandoning himself to the service of Slaanesh, he renamed the 13th Order the Order of the Hydra and has since become a black stain upon the galaxy. Those who have the displeasure of meeting him, or one of his underlings psychoactively repurposed into believing they are him, are often surprised to discover he has retained his sanity, and that his hatred for the Imperium stems from what he considers a logical conclusion born from the events he has witnessed.