Brief introduction of black clover

The comic "Black Clover" was almost destroyed by a fiend. It was saved by a wizard called "the magic emperor" by later generations ... two teenagers abandoned in the church, one is Uno, a four-leaf clover wizard with outstanding magic power and magic talent, and the other is Ashtar who accidentally got the black clover magic book with a magic value of zero ... This is a story about a boy who wants to be the magic emperor without magic power.