The first time Asta met Fanzell Kruger was shortly after he received his grimoire. In order to train with his new anti-magic sword, Asta holes up in the woods and meets Fanzell, who is looking for his missing fiancée, Dominante Code. Fanzell uses wind magic and is able to turn wind into a sword so he helps Asta train. One day while they’re in the forest, someone comes for Fanzell’s life...
As long as you don't use it for anything 
bad like that, I'll teach you.
طالما لن تستعمل ذلك في أيّ شيء 
.سيّئ كذاك، فذلك يكفي
Basta con que no lo uses para maldades.
Basta con que no lo uses para fechorías.
Tant que tu t’y tiens, ça me suffit.
Non compiere azioni meschine come queste,
non ti chiedo altro.
Só peço mesmo para que não use
o que ensinei para nada de ruim.
Если не обратишь свою
силу во зло, то ладно.