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 curse. Undine worries about Gadjah but collapses from Megicula's spell. Megicula mentions how it is the same as their last fight, and now Noelle Silva cannot use Saint Stage magic. As Charlotte Roselei, Rill Boismortier, Gadjah, and Undine are wounded and cannot fight, Megicula proclaims that it is truly over.

Noelle says that it is not over yet and uses her Valkyrie Dress spell but Megicula's spell begins breaking the armor. Megicula says that there is no way that Noelle can win, and wonders why Noelle is still struggling even through it does not 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 than 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 love for her children, Gadjah had fought for Lolopechka due to his loyalty to her, and that Noelle is fighting with hope which does not even exist. Megicula then wonders why humans just do not give up.

Noelle thinks about she cannot defeat Megicula and should give up, but tells Megicula that a human's strength lies in not giving up. Megicula does not understand and decides to end the fight by detonating Lolopechka's devil power, which should kill everyone in the castle and allow Megicula to 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 the Princess. Noelle is glad to see Asta and starts to cry from the hope now present, as Megicula wonders who this human is.