Arc 10

This unnamed arc is the 10th arc of Yūki Tabata's Black Clover.

Synopsis
Later Julius is with Yami at the Clover Castle, and has called Asta, Secre, Noelle, and Mimosa to them. Julius tells the four that even through the battle is over, that their are still three problems. Julius says that the magic emperor is gone, which Yami says that Julius is still alive in front of them. Julius explains how he has lost most of his magical power, along with his influence with the nobles has also weakened. Asta asks why Julius is so young, which Julius explains how he found an artifact that is capable of storing magic and used its magic to store magic in the mark that was on his forehead. Suddenly Julius notices Secre and starts to ask her about what her magic is, which Yami pulls him away from Secre and everyone accepts that the young Julius is the magic emperor. Yami tells Julius to continue his story, which Julius informs the others the Clover Kingdom will be destroy by a foreign nation which shocks the others. Julius final says that the final problem is that Asta will die, which Asta wonders why he will die. Julius explains how Asta's power comes from a devil, and how the horns that Asta obtains in his Black Form is the sign of a curse called Weg. Julius explains how the curse is from someone using the power from the realm of the devils, which Secre explains how she obtained be horns from using a forbidden spell and now she is able to transform into a bird at will now.

Julius gets excited about Secre's magic, but Asta asks him to continue with his explaining his reasoning. Julius apologizes and says that their are currently three countries that surround the Clover Kingdom. The first is the militant nation, Diamond Kingdom, that has a powerful army because of their scholars of sorcery, black magic, and human experimentation. Next is the neutral nation, Heart Kingdom, which they have adapted to their rich natural land to have mastered their own unique style of magic. The last is the demon nation, Spade Kingdom, which they have achieved supremacy by serving the ancient horror that slumbers within the extreme cold of their massive land. Julius also explains how the Spade Kingdom has expanded their influence the grans magic zone, to their kingdom. Julius then explains how their own magic knights are currently exhausted and that some of them have turned against them while their were possessed by the elves. Asta says that it was all the devil's fault, which Julius explains how the magic congress will condemn the devil's power and make Asta the scapegoat since he uses the power of a devil. Asta wonders who will run the magic congress, which Julius says that the royal house of Kira is in charge of that.

At another part of the royal castle, Augustus is complimenting Sekke for protecting him which Sekke things about how it was all just a coincidence. Sekke decides to bluff his power, when four mages suddenly appeared and proclaim that they will kill Augustus. The four go to attack Sekke and Augustus, which Augustus tells Sekke to protect him but Sekke thinks about how he is almost out of mana. Suddenly someone uses their magic to shrink the mages spells, which the mages wonder what has happened. The mage says that four are evil and uses his magic to force them to kneel. The mages asks if the king is alright, which Augustus says that he is not alright while calling the mage Damnatio. Suddenly Damnatio get a reaction, and says that he will judge the one that is possessed by a devil.