What I love about Danmachi are the spells, the magic spells in this anime/LN/Manga are so very have to do with the character's personality and background experience.

For example Haruhime's UNK, if you listen carefully on her chanting you will understand that each sentences are something to do with her experiences and her love for Bell.

I'm pretty sure that if Hestia will bestowed her a bit of her Holy Flame, Haruhime will difinitely able to create all the nine tails at once. Hoping it will happen...