Thurimbane is a decently sized mining guild, a subsidiary of the Miners Guild, that operates in Vardev. It is in charge of many of the operations in and around the town, and works closely with the Mercenaries Guild to keep the area safe. The guild is almost completely comprised of dwarves, but it contracts with other races for matters outside of normal operations.
When something bad happens in the land Thurimbane is in control of, they are expected to sort the issue out, or they will be economically strangled by the other guilds.