As Asta and the others were chasing the creature that lived in the cave beneath the Yultim Volcano Trail, they happened upon a dungeon. They were then ordered to explore the dungeon by the royal capital, so they split into groups and went in. They head in with Leopold and Vice Captain Randall, but those two end up running into the creature from earlier. They work together but cannot defeat the monster, which makes Leopold feel useless. At that moment, Leopold remembers the strange feeling he felt when he was fighting the elves, and...
That's the nature of the curse 
that befell your mother.
.تلك هي اللعنة التي حلت بأمك
Así funciona la maldición
que le pusieron a tu mamá.
Así funciona la maldición
que le pusieron a tu madre.
Telle est la nature de la malédiction
dont a été victime votre mère.
Questa è la natura della maledizione 
che ha colpito vostra madre.
É essa a natureza da maldição
que caiu sobre sua mãe.
Такое уж проклятье лежало
на душе вашей мамы.