Black Clover, Vol. 20 Why I Lived So Long

In a world of magic, Asta, a boy with anti-magic powers, will do whatever it takes to become the Wizard King!
Asta is a young boy who dreams of becoming the greatest mage in the kingdom. Only one problem—he can't use any magic! Luckily for Asta, he receives the incredibly rare five-leaf clover grimoire that gives him the power of anti-magic. Can someone who can't use magic really become the Wizard King? One thing's for sure—Asta will never give up!
The Black Bulls suddenly find themselves trapped in Dorothy's magical dream world. With Dorothy having complete control over the space, escape seems impossible! Meanwhile, Asta has his hands full against powerful mirror magic wielded by a former ally!