A vast, intricate complex of kilns and forges where the low-grade ore from the Thunderhead mines are turned into steel of unsurpassed quality. What are the secrets of the Acibus Foundry?
When was the last time a character caught a cold or flu? Real people get them every now and again even with solid heating and dry interiors. Your characters are out in the cold and wet, and even inside is not always dry and warm. Imagine having to stop your dungeon crawl, sitting in a tight defensive position, while you all are feverish.