You reluctantly progress through the fetid marshwaters which have collected in this ancient cavern. A Swamp Owl rattles overhead while transfixing you with enormous blind eyes, an evolutionary reaction to this corrosive and sunless world. Strange plants curl around ancient rock walls, and a heavy mass of lichen seems to watch you as you pass... As you peer to regard the elaborate carvings on the walls, you realise they are in fact the graffiti of subterranean Criminals, inscribing their illegal thoughts into the very rock. You ready your axe - there must be a nest nearby...