Would it be possible for an Arch-Heretek to somehow find a way by which to bind a C'Tan shard in human form, or at least a form that looked human, and cause it to forget its own godlike nature?
A bit of context: A while ago, my Explorers encountered a renegade forge world called Irtaufe. irtfaufe was exiled by the Adeptus Mechanicus and declared excommunicate traitoris for its worship of a graven idol that the Magi of Irtaufe believed to be the Omnissiah reincarnated in human form. She was able to repair devastated machinery, appease machine spirits with but a whisper, and perform other Omnissiah-esque miracles. However, she herself does not understand her abilities and has become a notable NPC who often accompanies our explorator, with whom she has become close friends, as said explorator is also a radical due to his firm belief in science, not faith. His lack of reverence for her is what makes their friendship work.
When they first met her, she had retreated from her royal palace to an isolated lab, because she had discovered that her Magos custodian,who was sort of like her surrogate father figure, was experimenting on mutants and killing them tot ry and replicate her abilities (for the good of the forge world, of course). She tried to solve the answer of her powers on her own, using dark tech that SOMEONE (hint: the big bad of the campaign) had supplied to her from inside Irtaufe's inner circle of magi.
I created this character not intending for her to become so integral to the campaign - if ever asked how she can do the things she can, I would have just said she was a very powerful psyker or something - but she is now become the campaign's primary MacGuffin. My explorator is trying to figure out how she ticks, my astropath wants to try and use her abilities for profit, my Rogue Trader is trying to dodge the Mechncium in case they discover that he is sheilding her from them, and my missionary wants to burn that tech-witch for whatever lets her interact with machines so innately.
Now that she's become such an important figure, and the party's attempts to discover who the arch-heretek that supplied her with chaos tech on Irtaufe truly is have taken front and center, I feel that she needs a really kick-ass explanation. I was idly reading through the old Necron codex when I cam across that passage about the C'Tan who "are gods of the physical universe" and can "manipulate reality and matter with a thought". Given that our explorator is an untouchable, I need a non-warp explanation for her powers (which she has used to heal him a few times), and something Necron-y or C'Tan-themed seems like the best route.
So here's my explanation: A long time ago, the Arch-Heretek of Irtaufe (let's call him Big Bad) was exiled from the Mechanicus for the usual xenotech heresy and so forth. He wandered around for a bit and discovered a C'Tan shard, and realized he could use this to turn the religious fanaticism of the Mechanicum against itself (he like irony). The plan was for half the Mechanicus to begin worshipping his DIY god-girl, and end up fighting the other half with the two factions destroying each other.
But could he even do that?
If anyone has a better idea, or you see plot holes/things that could be changed to make more sense, please point it out or make more suggestions.