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!

The Magic Knight Squad Captains decide to have a meeting about the problem with the devils that ended up involving the whole Clover Kingdom. Asta and the others who were in the Heart Kingdom were also summoned and they disclose the information they gathered in front of Julius, Damnatio, and the Captains. After hearing what Asta and the others had to report, Julius tells everyone what they need to do in order to deal with the devil Megicula.

The Magic Knight Squad Captains end up doing a team battle due to Julius’ suggestion. Since the citizens are still weary after the attack by the Eye of the Midnight Sun, they want to prove that they still mean to protect the kingdom and its citizens. The Magic Knights watch in anticipation as their captains split up into two teams and go all out in this battle.

Though Vangeance, the Captain of the Golden Dawn, had asked Langris to return to his duties as vice captain, he continues to distance himself from the squad. Yuno had suddenly moved up all the ranks at a decoration ceremony and Langris asks him to fight him. The rest of the squad seems shocked, but Yuno accepts Langris’ request and fights him and they have a fierce battle. But during their fight, Yuno seems to have some doubts with how Langris is fighting.

The Spade Kingdom successfully takes over the Diamond Kingdom and then sets their sights on the Clover Kingdom and Heart Kingdom. The Spade Kingdom troops get through the strong magic region using a mobile fortress which sucks up the mana of the Spade Kingdom citizens who were taken by force. But then Asta, who had finished his training with the Spirit Guardians, comes to the rescue! Meanwhile, Luck and Leopold head to the Spade Kingdom in order to try to take over one of their bases.

The War against the Spade Kingdom begins in earnest as the Heart Kingdom and Black Bulls come under attack by Dante and Vanica of the Dark Triad.

Due to Nacht's spell, the Devil who has been granting Asta power since the beginning has appeared physically. To master his Devil powers, Asta must battle and defeat his Devil, and force him to submit. But Asta has other plans... Meanwhile, Yuno, Noelle, and the others grow stronger in order to take their revenge against the Dark Triad.