Episode 51

Proof of Rightness (正しさの証明) is the 51st Page of Yūki Tabata's Black Clover and the final episode of the first season.

Summary
Asta congratulates everyone on a job well done back at the Black Bull base. They remember suddenly that they forgot Gordon Agrippa, who's sitting in a corner upset. Yami tells the squad that he's going to go report to the Wizard King Julius. He says that Charmy is going with them so that she can bring along the prisoners and Finral will transport them there. Asta also asks if he can come but Noelle reprimands him and tells him that he needs to rest. Not that she cares. Yami agrees that he should stay but since he was there when the Wizard King gave them the mission Yami agrees that he can come with them. They arrive at the Capital and Yami dismisses Finral allowing him to go flirt with cute girls. Yami and Asta report to the Wizard King. The Wizard King tells them that they'll send Vetto's corpse for an autopsy and will interrogate the other prisoners that they brought back. Julius praises Charmy for her binding charm and Yami hands over the magic stone. The Wizard King praises them for accomplishing this mission and he also points out that Yami has gotten stronger because of it.

Julius remembers when he first appointed Yami as a Magic Knight captain. He tells him that he's become a magnificent captain. Yami tells him that he's just proved that Julius was right and that his Magic Knights proved that Yami was right. Julius congratulates Asta on his newest achievement and tells him that he's one step closer to becoming the Wizard King. Asta asks him if he can have his autograph and Yami gets mad at him. Suddenly, Marx interrupts their meeting and tells Julius that Kiten is under attack by a Diamond Kingdom squad. Marx shows them a visual and Asta asks why there are so many people attacking. The group is being led by Ragus, Broccos, and Yagos. They are three of the Eight Shining Generals. Asta asks what that is and Yami explains that they are the eight strongest of the Diamond Kingdom. Meanwhile, the generals say that if they conquer Kiten then that will give their forces an advantage. Also, that location is packed with resources.

The Magic Knights of Kiten form a defensive line against the Diamond Kingdom to prevent them from invading. They activate the magical barrier in hopes that it'll keep them out. They focus their attacks on Ragus in order to take him out first. Ragus is unharmed and retaliates with his own attack. This attack brings down the barrier. They charge ahead and enter the town of Kiten. All hope seems lost as Yami, Asta, Marx, and Julius watch from a distance. Suddenly, Golden Dawn arrives ready to turn the tide of the battle. Yuno attacks Broccos and blows him away. Sylph tells him to use her magic and that he doesn't make friends because he never smiles. Sylph tells him to hurry up and defeat these guys so that they can go on a date. Yuno says no much to Sylph's dismay. They continue to watch as the Golden Dawn fights the Diamond Kingdom. Julius marvels at the air spirit and wants to meet her in person. Charmy is excited to see her meal-saving prince. Asta just grins.

Julius tells them that he'd like to send reinforcements to help. Yami asks if he wants them to go but Julius asks if he's sure since they just returned from the Underwater Temple. Yami says yes that he feels invincible and that he's concerned about someone there. Julius says that he'd like to go but he can't leave the Capital. Yami wishes he'd had Finral come up with him so that they could head over to Kiten. Asta asks if he can go but Yami tells him he'll just get in the way because he's hurt so bad. Charmy says that she'll go along and protect Asta. Yami relents and tells them that they can come. The three of them go in search of Finral. Meanwhile, Langris and the captain of Golden Dawn watch the battle. They decide to make the Diamond Kingdom regret stepping foot in their country.

Events

 * Invasion of Kiten