Asagi: It requires an immense amount of matter to fuel itself. While it seems to convert nearly anything organic, it seems to have a preference for solar energy.
It also seems to have an all-pervading consciousness that exists in practically every antiparticle that it consists of.
We Are Our Avatars Forever (Now on Discord by invitation, PM)(@Quartz) Hastur: The Mattervore, as it's called among us, is the foul offspring of Ghroth and Cxaxucluth, which is itself a spawn of Azathoth that endlessly multiplies and gnaws upon itself. Despite it being a progeny of Outer Gods, it itself is classified as the Great Old One, not as a being too potent for us to tackle... which is a blessing. And, you know... ~sigh~ this information doesn't help us at the moment.
Oliver: Where did the Mattervore start? Nowhere.
What did it eat first? Nowhere.
I don't know. Call it a stupid hunch from a stupid coward robot, but something tells me it's the right way to look.
"Seven is here too, dressed like the concept of choosing clothes that look nice together was an arcane secret far beyond their grasp."Asagi: The idea has merit on the basis that the ritual those cultists had used to open a way into this universe for this mattervore appeared was indeed in the Middle of Nowhere. So making its home there would undoubtedly be the most logical course of action.
We Are Our Avatars Forever (Now on Discord by invitation, PM)

Asagi: Ask the mad scientists. If I could think of a guaranteed solution, I would have thought of it a long time ago. I can only guess.
We Are Our Avatars Forever (Now on Discord by invitation, PM)