Episode 15

The Diamond Mage (ダイヤモンドの魔道士) is the 15th Page of Yūki Tabata's Black Clover.

Summary
Alecdora Sandler asks William Vangeance why he sent Yuno to explore the dungeon. Captain Vangeance tells him to trust him because he trusts Yuno. Klaus Lunettes asks Yuno why he saved Asta and Noelle because their only mission is to explore the dungeon. Mimosa Vermillion says hello to Noelle and reveals to Asta that she is Noelle's cousin. Noelle isn't at all happy to see her and believes that Mimosa is as rude as ever when she asks Noelle how her magic is going. Mimosa brags about them earning a star but Asta and Noelle tell them that they too earned a star. Klaus doesn't believe them. Klaus asks where the third member of their group is but Noelle and Asta don't know. Klaus says that they are an embarrassment to the Magic Knights. Asta retorts that they are going to be the first to explore the dungeon. Klaus and Asta get into an argument over their captains while Yuno, Mimosa, and Noelle watch. Mimosa uses her magic to learn the layout of the dungeon and Yuno carries them off. Asta and Noelle follow after them. Both Asta and Yuno wonder who's going to get to the treasure chamber first. Nero helps guide Asta and Noelle through the dungeon. Meanwhile, Yuno tells Klaus not to underestimate Asta. A messenger reports to the Wizard King that a Diamond Kingdom squad led by the Lotus of the Abyss is also at the dungeon. The Wizard King doesn't seem worried because he knows that those he sent to investigate are strong. Luck defeats the Lotus's subordinates and faces off against Lotus himself. Lotus tries to explain why they're invading Clover kingdom and that's because they are running out of resources but Luck is only interested in fighting. The room suddenly starts to spin and Luck wonders how if he hadn't gotten hit by any of Lotus's magic. Lotus reveals that the whole room is filled with his magic. He cast the spell to weaken his abilities while Luck was fighting his subordinates. Yuno and his gang arrive at two large doors. Mimosa suddenly gets hit by magic and collapses. She's injured by an unknown Diamond Kingdom mage. Luck continues to weaken but suddenly gets a second wind and attacks Lotus with more lightning magic.

Fights

 * Luck Voltia vs. Lotus Whomalt