The mysterious girl that showed up out of nowhere was actually Filo. She's a filolial queen with an advanced transformation ability, and she can even take human form thanks to it. However, her clothes get ripped every time she transforms, meaning Naofumi has to get her some magic clothes if he doesn't want to go broke. The party leaves on a new adventure to gather the materials required.
A crystal ball. It measures 
one's magical affinity.
كرة بلّورية. تقيس العنصر السحريّ لدى الشّخص
Eine magische Glaskugel, mit der man
die magische Affinität ermitteln kann.
Una bola de cristal
que ve la aptitud mágica.
Una bola de cristal
que ve la aptitud mágica.
Une boule de cristal
qui dévoile l’affinité magique.
Una sfera di cristallo,
serve a verificare l'affinità magica.
É uma bola de cristal. Ela mede
a afinidade mágica das pessoas.
Шар для определения
магических наклонностей.