"Anyone can draw a map, boy - there's no more difficulty in that than laying brick. What makes maps useful is when they are so proper, so precise, that they are living images of the places they represent. Encompassing knowledge of the geography, and mastery of the very space itself - that, child, is cartogramancy."
- Sage Pakpao Sasithorn, Chief Lecturer, the Ezagun-Darkbolt College of Cartogramancy
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.