Months after arriving at the Heart Kingdom, Asta still doesn't have any magic, but he's become more powerful at an alarming speed due to his training with the Spirit Guardians. Anti-magic is one of the magic attributes that falls into the "Arcane Stage" and is needed to defeat the devil. And because of that, Gaja asks Asta how exactly he obtained the five-leaf grimoire...
that captain is another Magic Knight 
who uses a sword, just like yourself.
.فذلك القائد فارس سحر آخر يستعمل السيّف مثلك
questo comandante è un altro Cavaliere Magico 
che, come te, combatte con una spada.
esse capitão é outro Cavaleiro
Mágico que usa espada, como você.