The Diamond Mage
Yuno, Klaus, and Mimosa from the Golden Dawn appear in front of Asta and Noelle, apparently sent on the same mission. Klaus mocks the Black Bulls for their awful reputation and gets in an argument with Asta.
Aired 16/01/2018EP 15 - The Diamond Mage
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)