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?
Her power isn't invincible.
قوّتها ليسَتْ قوّة لا تُقهَر
dass sie eben
nicht allmächtig ist.
Ella no es omnipotente.
No es omnipotente.
Son pouvoir n’est pas sans failles.
che i suoi poteri non possono tutto.
O poder dela não é invencível.