Isaac and the Black Sword Knights are responsible for training the Maihama army. While he's in Maihama Isaac gets to know the new crown prince of Maihama, a young boy named Iselus.  Iselus respect looks up to Isaac and respects him.
At a party for the crown prince's birthday, assassin's make an attempt on his life.
That sword's just expensive, not useful.
Das Schwert ist nur teuer und nutzlos.
Cette épée ne te servira à rien.
C’est de l’argent gâché.
Quella spada è costosa, 
ma non puoi usarla.
Essa espada é cara, você não pode usá-la.
Этот меч дорогой, но бесполезный.