You opened the letter attached to the application.
I'm Asi. According to research, a rare ore exists in Scorching Wind Desert. Unfortunately, it's nearly impossible to mine; only flying dragons in the desert can easily retrieve it.
Can you go to Scorching Wind Desert and take a look around the Roaring Maw? Perhaps you'll find clues from the Roaring Dragon Whelp and the Stone Pillar Dragon.
If you succeed, I can recommend you for membership in the Iron Stone Association.
Asi's understanding of the ore surpasses most, but he still doesn't believe he'll succeed, Hatt said with a shrug.
If one can obtain the ore using flying dragons, it would be quite the breakthrough. The Association would be in shock!