User blog comment:IamJakuhoRaikoben/Chapter 390: The Story of a Boy, Review./@comment-4449950-20140628040909/@comment-7418318-20140628082028

Same here.

But picking up the point from Marco, Jellal might become the Deus Ex Machina against the Faces, but I'm thinking for of the Selfdestruction Circle. Abyss Break and Sema are just big AoE spells. Destructive over a certain area, but that's it.

Selfdestruction Circle on the other hand was shown to start small and then grow and form connections, so it might be able to spread from one Face to the next (if they are connected) and take all of them down with a single casting, instead of having to take them down a few at a time.

Even Jellal won't be able to use Sema or Abyss Break on 3000 Faces without running out of magic power. And even if he could, he still wouldn't have the necessary time to reach all of them before detonation.

But I also just had another thought: Maybe Lumen Histoire does something a lot like Face, but only temporary. Imagine if LM could deactivate or seal all magic in a certain area, it could solve the Face problem. Juding from the first Face, the pulse bombs use magic to eradicate magic. Make their power-source unavailable and they become duds, but unlike Face, LM could just be shut down again and magic returns to normal.

And if it's necessary for the story that the Demons get one small anti-magic zone, LM could have a limited range that results in most of the Faces being covered and thus the majority of the continent is saved, but one still goes off in the middle of nowhere, giving the Demons what they need to revive E.N.D. without being the end of magic for the rest of the continent.