ah, I guess I misunderstood that scene, then. I thought they're talking about "Bestowal" magic, but they're actually talking about the magic tool they just created.And "Bestowal" can only store spells into tools, not Mana.
well, that would make the twice mana requirement even more strange, no? I mean, using 2 bloodline seems like something that requires precisionAnother explanation given in the novel was that people with large amount of mana find it is very difficult to control small spells. While they can cast large scale magic, they have trouble casting small precised spells properly.
so using your example, Francesco somehow needs to have 6000 MP even though 3000 MP should be enough to use either of his bloodline magic (that cost 2000 MP and 3000 MP respectively).The way the magic works is that when one has two bloodlines, they would need to be born with at least twice the amount of mana to pull it off