A brief description of the manga BLACK CLOVER:
Asta and Yuno were once abandoned together at a church. From childhood on, the two were inseparable, but there was also a rivalry. One of them was to become the next magic king, they swore to each other and so their goal was clear. While Yuno turned out to be a genius in the magical arts, Asta was unable to use magic and trained his body to compensate.
When Yuno receives a mysterious grimoire with a four-leaf clover instead of the usual three-leaf clover, and shortly thereafter is in great danger, Asta’s true power suddenly reveals itself. He attains the “Black Clover” grimoire of anti-magic. With the same goal in mind, the two friends and rivals embark on their journey.