Early on in his life Vulcan established himself as the best blacksmith in the entire continent 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.
Once your "Guardian Gauge" becomes full it will flash and glow. You can then press "v" or click the Profession Emblem next to the Guardian Gauge to call the Guardian for a certain amount of time.
Once activated Guardians have powers that increase a players skills up to a maximum of 30 seconds. These powers allow the player to use exclusive skills. These exclusive skills are strong but the more you use the exclusive skills the faster Guardian Mode is depleted. The Guardian and exclusive skills you gain depends on your profession. As your profession level increases you will become more powerful.
Vulcan increases the summoners melee defense and allows the usage of exclusive skills such as Hammerfall which decreases the enemies defense.