Episode 136

A Black Deep-Sea Story (黒の深海物語) is the 136th Page of Yūki Tabata's Black Clover.

Summary
When a guardian of the sea goes berserk and affects the surrounding sea, Noelle Silva and Finral Roulacase accompany Kiato and Kahono on a mission into the Void of No Return to placate the guardian.

Trivia

 * This episode mistakenly has Noelle use Mana Method before her training in the Heart Kingdom.