Chapter 300

Beyond Tenacity (不諦の先) is the 300th Page of Yūki Tabata's Black Clover.

Summary
Megicula praises Gadjah's spell but explains how their body is under the protection of an ultra high-speed recovery spell. Undine worries about Gadjah but collapses from Megicula's spell. Megicula mentions how its the same as their last fight, and now Noelle can't use Saint Stage magic. As Charlotte, Rill, Gadjah, and Undine are wounded and can't fight, Megicula proclaims that it is truly over.

Noelle says that its not over yet and uses her Valkyrie Dress spell but Megicula's spell easily dispels it. Megicula says that there is no way that Noelle can win, and wonders why Noelle is still struggling even through it doesn't see the point. Megicula speculates that Humans struggle in order to create new spells, but explains that there is no human alive who can produce a spell that is capable of defeating them within their Decaying World spell.

Megicula explains that Devils never disobey those that are higher level then their own rank, and comments about how humans hold onto nonsensical ideas and risk their lives for meaningless things. Megicula explains that Acier Silva fought with lover for her children, Gadjah had fought for Lolopechka due to his loyalty to her, and that Noelle is fighting with hope which doesn't even exist. Megicula then wonders why humans just don't give up.

Noelle thinks about how there is no way for her to defeat Megicula and wants to give up, but tells Megicula that a human's strength lies in not giving up. Megicula says that they don't understand and would like to learn more, but time is short and decides to end the fight. Megicula uses their Exploding Life spell on Lolopechka, and explains that everyone in the castle will be killed and it will fully manifest. Noelle reaches out to Lolopechka, but Asta suddenly arrives, tags in Noelle's place to save Lolopechka and uses his Demon-Destroyer Sword to negate the magic power from swelling inside her. Noelle is glad to see Asta and starts to cry from the hope now present, as Megicula wonders who this human is.