The circle offers anyone who is willing to pay 20 gold to work at the forges. The heat will warm everyone working there and who knows you may make new friends. (The gold is for the Plauge, if they don't have da gold then 200 coins)
Bloodsworn fortress-cities would initiate the High-Realm plans, designed to counter any harsh winters. War-Smiths had been working on several methods to counter the winter years, among them heat distribution methods through entire cities and technologies that would keep warm air in and cold air out.