“ Mining in a certain area turns all exposed skin (maybe just parts that are actively disturbing the chemicals that cause the reaction) of the those doing the mining to a dark blue color. Will wear off taking as many years/days spent in the mine.”
“ I am in the process of planning a complete steampunk themed campaign world.
The underdark will not be made up of caverns or caves, but huge, interlocking gears. The gears will be constantly moving and are basically a gigantic mechanism.
Part of this underdark is controlled by an insane analytical engine (mechanical computer).
Stay tuned for more details”