The tech-priest once known as Zarkov Vetinari is heard before he is seen; he is invariably proceeded by the thumping boom of nearly a quarter ton of man and metal slamming down on the ground beneath his feet.

The feel of his footfalls is invariably followed by whispers echoing ahead of him, strange mutterings, bursts of static and high-pitched noise that some recognize as the language of the Machine Spirits.  His respirators hisses like a venomous snake as he voices his displeasure with those other than the Adeptus Mechanicus, what with their ill-fitting approach to the glory of the technological provenance laid out before their eyes.  He casts that luminescent gaze all over in jerky motions, like a bird scanning its environment, the unchanging mask lending the scene a grim and unfeeling countenance, as if he is impassively judging all before him.

Zarkov lives within a suit of heavily-modified dragonscale armor, a power suit that lets him be at peace within the bosom of the Omnissiah through even the simplest of actions, hiding away his flesh from the world at large more often than not.  Void-born, his natural form is tall and slender, standing several inches past six feet in height.  With his Machinator array and armor, he weighs in at a bulky quarter-ton, a supremely effective conjunction of man and machine.

He is an unforgettable sight, enclosed within his power suit, his most prominent features the near half-dozen mechadendrites which are the source of his appellation, "Spider."  These extra limbs move of their own accord, lending him abilities beyond those of the simple creatures who know not the blessings of the Omnissiah through his mortal vessels, the agents of the Adeptus Mechanicus.  Sprouting from his shoulders are a pair of mechadendrites wielding Hellpistols, fearsome armament for the Mechanicus Secutor; between the laspistols, the imposing sword wielded by one of the limbs, the injector pistons, chainscalpels, cutting blades and the strange tools clustered on the others, the Myrmidon makes for a rather unsettling sight to the average citizen of the Empire, and even to those veteran enough to understand precisely what they see before them.