Gauche is gravely injured in the fight against Dante which causes Asta's devil powers to go berserk.

He completely loses himself and relentlessly attacks Dante! But Dante becomes even stronger and Asta ends up on the ground. Then Captain Yami and Finral show up to the scene shocked and Yami is instantly enraged and joins the fight! Meanwhile, the Heart Kingdom is under attack by Vanica and her subordinates and the Spirit Guardians went to fight them, but Vanica's subordinates who had been given devil powers were far more powerful than expected, and...
I'm just going to give 
myself rock-hard defense!
!سأمنح نفسي دفاعًا صلبًا للغاية
werde ich auf komplett
harte Verteidigung umschalten.
¡me fortaleceré al máximo
preventivamente!
¡me fortaleceré al máximo
preventivamente!
Je vais me doter d’une solide défense
d’entrée de jeu !
vorrà dire che mi ricoprirò
di un guscio granitico e impenetrabile!
Eu vou me dar uma
defesa dura como pedra!
Не буду тянуть кота за хвост,
а сразу укреплю своё тело!