New Forge World Mechanicus Models
Magos Dominus

"I care not for the Warmaster’s petty ambitions, nor for the merely organic masses who swarm across the worlds of this Imperium; but when his machinations threaten the sanctity of our forges and the advance of our knowledge, he will come to fear the wrath of the Omnissiah’s chosen."

-Magos Dominus Avik Nomaan
 
The Magos of the Priesthood of Mars are the masters of much of what remains of the vast and potent secrets of the Dark Age of Technology. To them the pursuit and preservations of the arcane mysteries of science and circuit are of far greater worth than petty wealth, worldly power or the lives of their fellow men. A Magos may live for centuries, prolonging their life through arcane science and progressive cybernetic conversion, willingly becoming something other than human as they seek to fulfil the Omnissiah’s will. There are many factions and sects within the Mechanicum, divided both by technological specialisation as well as rivalry and ancient feud, each vying for power, knowledge and resources beneath the outward unity the organisation displays, shrouded as it is by impenetrable mystery and arcana.
 
Castellax
 
"Those we had once called ‘brother’ unleashed all the terrors of Old Night upon us. Crawling phosphex infernos and rad storms left only blackened corpses in their wake – until the Castellax strode forth. No rad-phage or flame could stall their advance, and their soulless gaze promised death to any who stood in their path."
-Legionary Shendrak Nal’kor,
Salamanders Legion
 
The most common of the widespread Castellan-type battle-automata in service, the Castellax is a general battle unit developed during the Great Crusade from its ancient forebear. Primarily intended for siege work and shock assaults, the Castellax Battle-automata is a hulking humanoid machine with a notoriously aggressive and responsive machine-spirit, and an enviable reputation on the battlefield.

The Castellax, employed in units of one to five by the Legio Cybernetica, has a standard configuration of bolter and bolt cannon armament, and is able to maintain a punishing barrage of firepower as it advances. 
 
Thallax
(Prior Release)
 

The Thallaxii are heavily augmented cyborg shock-troops used by the Mechanicum Ordo Reductor, and they differ from the Skitarii regiments both in purpose and the unique degree of their augmetics. The Lorica Thallax was developed from power armour technology and requires a robust human specimen.

The Lorica encloses the major organs, nervous system and cerebrum, but entirely replaces the skeletal structure and limbs with armoured bionics powered by an internal reactor-core. Surgical excision of the subject’s pain sensors, emotions, and normal human sensory apparatus and the agony caused by the Lorica’s implantation, leaves the Thallax a cold, calculating killing machine (albeit one that retains a degree of independent thought).

To some among the Mechanicum, this operation skirts the edge of abomination, yet the baleful Ordo Reductor continue Thallax conversion regardless; using suitable Forge Guard, fallen Skitarii, and other subjects obtained from more mysterious sources.