I dont think thats how two lvl 10s would fight. Magic in Orario needs to be chanted and the stronger the magic as to longer the chant. Most mages cant do concurrent chanting also chanting magic when they are fighting (dogding, parrying etc.). Fate Servants can casually fire magic like its nothing and destroy things easily like you saw with Karna vs Siegfried. It is not thinkable that any lvl 10 can do that especially when you consider that there werent any lvl 10 adventurers to begin with. The lvl 9 captain of the Hera Familia is the highest lvl adventurer that we know about and she was destroyed by OEBD easily and she even had support from mutliple lvl 8s and lvl 7s notibly Zard and Alfia with there broken abilities.

I gues i stand corrected altho spels do get stronger the higer level you become and i would not be surprised that conrurant chanting is more commen for high level mages. but than again i myself have compared danmachi to dnd and basicly the same goes there. were as in orario disquise spels are game chaning in dnd every mage can use it. And most attack spells take 6 or 10 seconds to cast and have and get like 6 more spels per level. So on avarage you have dnd characters be way stronger than their danmachi counter part (ignoring fells who totaly breaks the rules). karna is a demigod right so in that case he has to be comapred to gods to wish ain't gonna happen in danmachi i think. however i do think that comparing i hypotetical level 10 bell might be a capable of putting up a fight against seigfried or saber considering the similarity bells argonout has with their nobel fhantasms. by the way excalibur basicly chanels the hopes and dreams of all heroes in fate right? i imagend that if they would figth would sabers nobal fantasm not drain bells skill sins she is basicly using his powers? just a silly thought derived from my understanding of their skills

How strong danmachi characters anyway? Is there a character strong enought to destroy a mountain?

There is not.

When I started this series I expected characters to be extremely op since they receive deities blood but I was wrong. Kinda disappointed with how weak they are.

With last two arcs power level in Black Clover went crazy. Would that happen in danmachi as well? I'm kinda hoping for that... Being this weak despite gods' blessing...

If I remember correctly Hestia (or some other god) said that with every level up an adventerer gets they step closer to the realm of the gods. By that logic eventually you could reach godhood through a falna. at least its implied i doubt there are any monsters that could rival the strenght of a god with his arcanium unlocked but we have yet to see deeper in the dungeon. And as for a character strong enough to destroy a mountain there most certainly isnt... but Riveria could probally cast a spell that would scorch most of the mountain.

DanMachi characters are strong but destroying a mountain is beyond their specs.

City level then ?👀

I remember aiz making a cave to shelter in book 8. Not shure thou, and maybe bell can do it later on with argonout but yea nobady can rigth know as far as i know