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.
I apologize for doubting your strength.
.أعتذر عن الشك في قوتك
Ich entschuldige mich dafür,
Ihre Stärke angezweifelt zu haben.
Me disculpo
por haber subestimado tu fuerza.
Me disculpo
por haber subestimado tu fuerza.
Pardon d’avoir douté
de votre force.
Mi scuso se ho dubitato della tua forza.
Peço desculpas por duvidar de sua força.
Прошу прощения,
 что сомневался в вас.