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?
You should be praising Izetta, not me.
ينبغي أن تثني على إيزيتّا، لا أنا
Nicht ich, sondern Izetta
hat sich ein Lob verdient.
Deberían elogiar a Izetta.
Deberíais elogiar a Izetta.
C’est Izetta qui mérite des éloges,
pas moi.
Più di me,
Todos créditos são 
da Izetta, não meus.