The Wizard King summons Asta after his work dealing with the Eye of the Midnight Sun. Yami tells Asta he can come with him to the royal capital, since he has to go to a conference of all the Magic Knights Captains.
who's connected to the 
Eye of the Midnight Sun.
.له علاقة بعين شمس منتصف الليل
con dei legami
con l'Occhio Magico della Notte Bianca.
vinculado ao Olho do Sol da Meia-Noite.