Vulcan Mining Co. is a corporation that makes most of its profits on gas mining. They own gas mines on Argonn and Ygana, which are used to supply energy and chemical weaponry for the Eternal Empire. Its CEO, Artero Grenn, is one of the richest men in the entire Empire, and he now lives in Kadua, Riana, where the corporation tower, known as Vulcan Tower, is based. It is the second tallest structure on the planet of Riana, second only to the Citadel of Knowledge, Riana's most sacred and cherished building. VMC is the only organization in the business of gas mining in the Empire, creating a massive monopoly and enterprise within the Empire's infrastructure.