Izetta is powerful enough to fight whole armies, but her strength is limited.  She can only use her abilities near certain ley lines, and outside them, she's no different than a normal girl. When the Germanian army attacks in a spot far from these ley lines, the duchy is forced into a corner: how can they repel these foes without giving up the secret of Izetta's strength?
Wait, that's...
...لحظة، هذه
Und … Was ist das?!
Espere, eso…
Espere, eso…
et attendez…
E...
Espera, isso...