L'Asta i en Yami s'han quedat sols lluitant contra en Licht i en Valtos, i tot apunta que els nostres herois ho tenen difícil, però en Gauche, després d'arribar a la ciutat transportat per en Finral amb la germana Theresa i la resta dels nens, rep molt de poder màgic per part de tothom i creu que, gràcies a això, podrà vèncer a l'enemic. Ho aconseguirà o a l'enemic també li arribaran reforços?

Licht and Lumiere fight against the devil using incredibly powerful magic. But the devil has incredible regeneration powers and quickly heals himself, making him difficult to defeat. Asta witnesses the two powerful mages fighting and tries to figure out if he can use his anti-magic in a more useful way. He’s able to use a new power, but it’s so powerful that he’s having a hard time controlling it. Meanwhile, Yuno also awakens to a new power… Asta and Yuno, who both aspire to be the future Wizard King, pull off an impressive attack in front of the first Wizard King!

Months after arriving at the Heart Kingdom, Asta still doesn’t have any magic, but he’s become more powerful at an alarming speed due to his training with the Spirit Guardians. Anti-magic is one of the magic attributes that falls into the “Arcane Stage” and is needed to defeat the devil. And because of that, Gaja asks Asta how exactly he obtained the five-leaf grimoire.

As the battles in the Heart Kingdom begin to come to an end, Asta and Yami decide to work together as they continue in their fight against Dante Zogratis of the Dark Triad.