Episode 66

The Eye of the Midnight Sun's Secret (白夜の魔眼のひみつ) is the 66th Page of Yūki Tabata's Black Clover.

Summary
While reading the reports, Yuno, Mimosa Vermillion, and Klaus Lunettes comment that they heard the Witch Queen healed Asta's arms. Mimosa is happy, but acts like she was not worried. Yuno and Klaus state the same, but Mimosa reveals she saw Klaus dumping water over himself each night and praying for Asta. She was going there to pray as well, but realizing she will reveal she was worried, Mimosa then states she actually did not see anything.

Klaus reveals he called Yuno and Mimosa because of Eye of the Midnight Sun, who tried to take the magic stone located in the Witches' Forest, but Asta and the rest managed to stop them and take the magic stone. They are going to have a study session and Klaus asks Yuno what he knows about Eye of the Midnight Sun. Yuno recalls how the Eye of the Midnight Sun attacked the Royal Capital and how the Magic Knights fought them. However, they initially did not realize their true objective was Crimson Lion's captain, Fuegoleon Vermillion's pendant, who ended up severely injured as they took the pendant.

Klaus then reads the reports of how Asta and the rest met Eye of the Midnight Sun near Nairn, and how other Magic Knight captains fought the Eye of the Midnight Sun strongest trio Third Eye. Seeing Asta using the Demon-Slayer Sword and Demon-Dweller Sword, the Eye of the Midnight Sun leader gets angry, but the Third Eye stop him and retreat. After some investigation, they realized that Fuegoleon's pendant had a Magic stone and that the Eye of the Midnight Sun wants to collect them, believing that with them they can be reborn in their true forms. Three more stones were left and they knew that one is located in the Seabed Temple, so the Magic Emperor assigned the Black Bulls to go and take it. Soon after arriving at the Seabed Temple, the Black Bulls faced one of the Third Eye, Vetto. They have managed to defeat him and obtain the magic stone located there and complete their mission.

Klaus then reads the report about the Witch Queen, who explains the stone heightens the wearer's powers, but only the elf tribe are truly able to use it. She theorizes that the Eye of the Midnight Sun may be descendants of the elves and Asta's two swords are the ruined remains of the magic swords used by the elves' leader. Klaus does not know what will happen if they collect the magic stones, but as Magic Knights, they will defend the Clover Kingdom.

Yami Sukehiro hands the magic stone to the Magic Emperor, who praises the Black Bulls for their excellent job and managing to defeat the Diamond Kingdom's forces and the Eye of the Midnight Sun. Yami states they need stars, like a lot of them. The Magic Emperor avoids the stars conversation and tells Yami that they managed to find the Eye of the Midnight Sun's hideout and it seems they are about to make a move.

Petit Clover
Prayers (祈り): Klaus is dousing himself with water while praying for Asta's arms, and Mimosa is keeping count. Klaus tries to convince Yuno to join him, but Yuno refuses.