Spirithil is a massive city, built haphazardly on top of itself. With no central planning, and space at a premium, the Undercity is substantially larger than the topside could ever be. Narrow stairs, cramped passageways, and sub-basements quickly lead into the dank and the dark of the Undercity. It is a mostly lightless place of fungus and twisted roots, for who would bring flame into that domain of wood? The Hovivner rule much of it, a secretive and isolationist culture, but it is far too vast a domain for them to control it all.