Proof of Rightness
After Captain Yami saved the Black Bulls in the Underwater Temple, Yami and Asta return the stone to the Wizard King and report what happened when suddenly a large enemy force arrives at one of the Clover border cities near the Diamond Kingdom... a Great Enemy has appeared, but the Golden Dawn Magical Knights Squad is rushing in.
Aired 25/09/2018EP 51 - Proof of Rightness

Black Clover
In a world where magic is everything, Asta and Yuno are both found abandoned at a church on the same day. While Yuno is gifted with exceptional magical powers, Asta is the only one in this world without any. At the age of fifteen, both receive grimoires, magic books that amplify their holder’s magic. Asta’s is a rare Grimoire of Anti-Magic that negates and repels his opponent’s spells. Being opposite but good rivals, Yuno and Asta are ready for the hardest of challenges to achieve their common dream: to be the Wizard King. Giving up is never an option!
(Source: Crunchyroll)