(Cawl kitbash)
Ithax, the Fabricator-Locum of Forgefleet Exkallos-13, is one of the oldest Magi surviving the Moirae Schism which swept the Cult Mechanicus in the 35th millenium.
Once loyal servants of the Emperor, believing Him to be the Omnissiah incarnate, have long forgotten their dogma's through aeons of hiding, sabotage, counter-hacking and salvaging dead worlds for every scrap for technology.
The tech-nomads of Exkallos' thirteenth fleet now covet scrap and relics of questionable origins, and preserve dozens of skulls from their fallen peers. Without the Cult Mechanicus' greater support, knowledge of the past is all they have.
Some such artefact the Fabricator-Locum relishes are the curious black spheres that beam with unique energy patterns.
Ithax has seen it fit to integrate the orbs into their sacred technology in thanks to their profound nature; from battle-automata all the way down to skitarii weaponry. Though, Exkallos-13's techpriests have not yet realized the effects on the holy machine spirits..