Water or Blood
Based in Lithumbria this crafting and mining guild dominates the fine arts and metals trade in the Empire. They have many masters that can create small wondrous magical items and these they trade for a high price with many groups. They have many age old contracts for specialty items that they produce such as the undead-bane blessed weapons they create for the Silencers, this is their largest contract but their are many others.
they are one of the few groups that knows how to [craft magic items]] and trains people to do so. but those secrets are closely guarded.