The Tech-Priest Dominus stands among the most senior commanders the Adeptus Mechanicus fields in open war. Having risen through centuries or even millennia of service, a Dominus has replaced nearly all of their original body with augmetics, becoming a walking arsenal draped in the trappings of high office. Mechadendrites, servo-arms, and integrated weapon systems sprout from their bulk, and their minds are vast repositories of doctrine, tactics, and technological lore.
In battle, the Dominus is both a formidable combatant and a force multiplier for the army around them. Their built-in weapons, from the volkite blaster that reduces foes to smouldering ash to the macrostubber and eradication ray, allow them to engage a wide range of threats. More importantly, they can invoke the machine's blessings upon nearby forces, repairing damaged war engines, empowering the fire of their soldiery, and steadying the resolve of the legion.
A Dominus commands absolute obedience from the Skitarii and servitors under their authority, directing them with the dispassionate precision of a master engineer solving an equation. They embody the Mechanicus ideal of the perfected being, flesh transcended and replaced by the pure logic and enduring strength of the machine, a living embodiment of the Omnissiah's will made manifest upon the field of war.