MC is a mage but cant use modern magic which is tied to technology, he's from a powerful family. In order to get stronger, he uses a grim war that makes him do trials.
Grimoire
https://www.mangago.me/read-manga/the_return_of_the_mythical_archmage/
That's it thanks you so much
MC is a mage but cant use modern magic which is tied to technology, he's from a powerful family. In order to get stronger, he uses a grim war that makes him do trials.