Question! Just to add to your pile, and it might be somewhere else but lj and the internet are having a fight:

Would summons that function like the ones in Symphonia do - manifestations of power, not technically physical beings - become more physical in this event? Like, you can't really bring down a giant ball of lightning that is just plain ol' lightning, or kick the butt of something made entirely of mana...idk if I'm explaining myself well.