If you hear loud sounds that makes your ears ring it might be the sound of a Blacksmith's hammer working their trade.
Blacksmiths are specialized to craft many kinds of weapons and armors, they can also obtain and refine minerals. Blacksmiths can not only craft weapons and armors they can craft many items related to minerals, this is a very important job in the world.

Blacksmiths harvest field minerals to use in the creation of weapons and plate armors.

Vulcan increases the summoners melee defense and allows the usage of exclusive skills such as Hammerfall which decreases the enemies defense.

Early on in his life Vulcan established himself as the best blacksmith in the entire content of Midgard. His name was known by all.

It was said that Vulcan was the one to have created the holy sword of Jormungand that tore the curtain leading to Vanaheim and expelled Freya. Vulcan was unable to complete his lifetime wish to create the Gods weapon and met the Day of Despair whilst in his forge.