Here one awesome anime, well most people I know are familiar with it, but its definitely a must watch anime.
In the world of magic whereby magic is everything even daily chores are done with magic, and their magic is measured by the clover leaf book they have.
There are one, two, three and four leaf clover books. The one leaf clover represent peace, the two leaf represent peace and hope, the three leave represent peace, hope and love but the fourth leaf represent peace, hope, love and goodluck. Royals were born with extremely high magic while those of other region were born with little magic.
Now black clover tells the tale of a boy born with completely zero magic capacity but still was determined to become the wizard king; the greatest mage ever, with his brother as his rival.
On the day, that they were to be chosen by their grimore Asta was not chosen because of his inability to use magic, whereas Yuno was chosen by the four leaf clover. As they were coming back, they were attacked by another mage, who restrained Yuno and was making a mockery of Asta's inability to use magic.
Not before long a grimore appeared before Asta and before him appeared a black sword. Apparently the grimore was a five leaf clover, and in the fifth leaf resides a demon.
That sword can negate and repel magic, and he is the only one that can use it because when a person who has magic holds the sword it sucks out their magic.