Black Clover Season 1 Part 4 contains anime episodes 30-39 directed by Tatsuya Yoshihara from Studio Pierrot.

What should have been a relaxing vacation turns into a chilling adventure when mysterious magic snow lures the children of Nean into a deadly trap. Joining up with Gauche, Asta will face his toughest challenge yet—trying to work with the stubborn mirror mage! While Gauche is more focused on protecting his beloved little sister, Asta is stuck fighting in the mud. But when members of the Eye of the Midnight Sun show up, this battle goes from dirty to dire! Luckily, an unexpected pair arrives as reinforcements. Will they have what it takes to face the powerful Licht and his elite squad, the Third Eye?