*suffering noise about how I'm torn on Formula Eltria*
Like on the one hand, it's basically an artifial Linker Core, and the limitations it has (being painful and damaging on bodies that don't come from high-gravity planets and aren't already particularly resilient) make it a good fit with the other magic systems and the version of it we see is clearly a bit of a prototype because it's only used by three people and was apparently created from a single prototype
but at the same time, why did it have to be nanomachines
why can it be used like Meister Arts?
Can the nanomachines manipulate mana in other things than the body they're inserted in and if yes -- does that have any limits? Contact? Mana amount??? And how does it interact when someone using it actually has a Linker Core, like Nanoha???