Black Clover

Synopsis

Yami learns the Heart Kingdoms can only be visited with an invitation. Finral visits Langris, who is surprised Finral is determined to improve himself and take Finnes Calmreich as his wife, though Langris believes Finral is incapable of making Finnes happy and challenges Finral to become a better man. Mimosa reveals the Heart Kingdom is rich in natural mana, ruled by a Queen as powerful as a knight squad. Mimosa acquires invitations to the Heart Kingdom for herself, Asta, Noelle and Finral, with Secre hiding in her bird form. As they enter the Heart Kingdom it is revealed the Queen plans to seize Asta’s devil power for herself. Gaja, a Spirit Guardian, directs them to the palace via a river that flows uphill, thanks to the Queen's Mana Zone, which is so large it covers the whole kingdom. Gaja explains every queen for 1200 years has made a pact with Undine, the Spirit of Water. Asta is suddenly kidnapped, while the others are forced to battle Gaja, who is vastly more skilled. Asta is deposited in the palace where his devil form impresses Undine. She reveals the Heart Kingdom measures magical strength in Stages and Asta barely ranks 9th Stage, the weakest, while Noelle ranks 1st Stage and both Mimosa and Finral 3rd stage , and it is suggested Gaja ranks even higher Zero Stage. However, working together, Noelle, Mimosa and Finral manage to land a powerful attack on Gaja, while Secre manages to free Asta from Undine and he attacks a nearby ki presence, assuming it to be the Queen.

(Source: Wikipedia edited)