 If you liked
Black Clover
|
 ...then you might like
Tsue to Tsurugi no Wistoria
|
Two manga about a boy who can't learn magic, no matter how hard he tries, inside a school of magicians, which has led to him being picked on all the time. That aside, he has another quality that is at least as potent as magic though, being able to fight with swords and negating other people's magic.
The MC has made a promise to climb through the ranks with a strong magician of their own age.