Thanks to Asta, Julius and Marx were able to undo the protection spell that was on the captives from the Eye of the Midnight Sun and ask them who the traitor among them was.
I've learned that there 
is a traitor among you
علمت أنّ هناك خائنًا بينكم
Der Verräter, der mit dem Kalten Auge
der Mitternachtssonne gearbeitet hat,
Abbiamo saputo che tra di voi 
si nasconde un traditore
Eu descobri que, entre
vocês, há um traidor