[Rita shakes her head sadly. She wishes, from the bottom of her heart, that they could keep the blastia. But that isn't realistic, and even if they could, it would probably just lead to a repeat of the same catastrophe sometime in the distant future.] Actually... part of my plan is to convert the cores of all devices across the world. We'll be losing our technology as a result.

And we can't restore the barrier. The original barrier wasn't powered by aer or mana, but with human lives.