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.
and can't use natural mana at all.
.ولا يمكنكم استعمال المانا الطبيعية إطلاقًا
und benutzt das natürliche
Mana überhaupt nicht.
No aprovechan el de la naturaleza.
No aprovecháis el de la naturaleza.
Vous n’utilisez pas du tout
le mana naturel.
e non siete in grado di usare quello naturale.
e não conseguem usar a mana natural.
А маной природы совсем не пользуетесь.