You came here in that? You are brave
All Agera work with a base-8 system (though of course, in GMing, for simplicity, I don’t). Accordingly, the Mysian system of measuring is based on 8s. From dolon to dolmelphion, the system is fairly straightforward, but, traditionally, after dolmelphion, it becomes a touch more complicated.
Throughout creation there are locations which serve as nexuses of sorts; conduits between one place and another. Such are the rules of translocation that only areas that border each other can be traversed by physical or magical means.
A small, primitive village has yet to discover fire, which is a good thing because there are highly flammable (but not otherwise dangerous) gasses in the air. The heroes, blissful in their ignorance, don't know that and think it a wonderful idea to show the locals open flame.