So this has been submitted before but no one ever replies, so, I was thinking of this when I was talking to someone about Tekxit. It would work a lot like how the pokemon mod does, but instead of pokeballs its talking to the demons and include different ways of talking and them requesting items, which can be anything related to the demon or metals. You would need a COMP to summon demons that can use magnite or just use power (with technical mods installed). You could also include the ability for the player to learn spells. I do think that this kind of mod would work well in minecraft, and with modpacks like Tekxit.