Sigma XI



''"Machine! Obey me! I order you to ha- AHHHUG!" "I...Order...You...To...Die."''- Sigma XI as it slays its creator during its escape from Mars

Sigma XI, also known as Cataphract and Deathstrider, is a rouge Thallax warrior that was tainted by Chaos during the events of the Horus Heresy in a heretical experiment. This killing machine was possessed by a daemon known as a Fury, and now stalks the Galaxy as a freelancer and mercenary, killing for needed repairs and ammunition.

The two beings have since merged into a single entity, one

History
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Personality
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