Ursarax

The Ursarax - sometimes also designated Ursurax - are mostly considered as a variation of the far more common Thallax, although they fulfill a very different role on the battlefield. Both Thallaxii and Ursaraxii are no simple Battle-Automata or mind-wiped Servitors but true Tech-Thralls which maintain their sense of initative and personnality, their bodies thoroughly augmented by the crafts of the Mechanicum forge-wrights. Although developped only in the second half of the Great Crusade, the Ursarax-design was quickly ratified by the Martian Mechanicum and by the time of the Horus Heresy, many Forge World Taghmata forces outside the Ordo Reductor used the design.