Avaricious Vulcan, Ruler of the Lower Floors was a powerful Magic Beast found inside the Demon Castle.
Vulcan is a morbidly obese demon of immense propotion, easily as large as a small building with red skin and glowing blood red eyes. He has a pair of pronounced lower fangs with razor sharp teeth and four horns of varying length.
Vuican is a powerful demon capable of immense speed despite his portly frame with the strength to match it. He is also proficient with a club as he used one to an impressive degree. He is estimated to be in the upper tier S-rank.
He ruled the Lower Floors of the Demon Castle and resided in Floor 50. He was the first Demon that appeared in the Demon Castle that was able to give Sung Jin-Woo some trouble as he was a capable fighter with extreme speed and strength, able to decimate Jin-Woo's Shadows. When he was killed, Jin-Woo was not able to extract a Shadow from him because he had a contaminated soul.