Belphegor - A demon of Sloth and Greed
Buzurivambavas is Bastard Demonspeak, and comes from the true Demonspeak bzhuu’vhambv’s, which means “carrying and crawling one”, or “one that carries and crawls”. They are a subtle kind of demon, and do not exhibit the terrible rage and bloodthirst of some other demons.
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.