Wow... wait... oh man, that is why she is so important, ignoring getting the spell vials, the most difficult part for a counter-attack plan was that the number of available mummys was low, but if they have a mamodo capable of making more, the vials become the only problem.
No, wait... I forgot, the petrified spell books, those aren't just any books... but, considering The Book is on their side, there is a plan for that.
And now that I think, this whole situation with Beliel, and the fact that those dolls were left 3000 years before... this feels too orchestrated, the book was a mysterious thing in the first series, but with how it ended, I just assumed it was some sort of higher being doing it... but with what happened now, there is more to this whole situation, and whatever is behind the spell books.
Even the tournament feels out of place now if we see it as just a tournament. I had many expectations for Jilnoz, but she still surprised me XD, I want to see her in battle.