The Horus Heresy : Mechanicum - Tech-thralls Covenant

Tech-thralls are a source of expendable labour on many forge worlds, typically created from those poor souls who transgress against their Tech-Priest masters. In times of war, this same fate befalls many in order to quickly raise a form of disposable militia, known as the adsecularis. The organic human bodies of the tech-thralls, already altered to lift heavy loads and function in hostile environments, are fitted with basic weapons systems and bodily protection. On the battlefield they serve as expendable troops, unskilled but relentless and indefatigable – an army of the alive-yet-dead, puppeted by the magi who command them.