Asta and the other Magic Knights chosen to train in the Heart Kingdom are joined by Magna and they finally start their training under Loropechika and the Spirit Guardians of Lightning, Earth, Plants, Fire, and Wind and Undine. Since Asta has no magic to begin with, he ends up sparring with Gaja, the Spirit Guardian of Lighting.  They Magic Knights all work harder to surpass their limits.
What you must do is not 
necessarily just one thing.
.قد لا يكون ما عليك فعله شيئًا واحدًا
Es gibt eine Sache,
die unbedingt getan werden muss.
No tienes una única función.
No tienes una única función.
D’autres options sont possibles.
Ciò che devi fare non si limita ad una cosa sola.
O que você deve fazer pode
não ser apenas uma coisa.
Нет нужды зацикливаться на одном.