A Darker Forest                                        -      N      - 
(-------------------------------------------------)     - <---(M)---> -
                                                        -      -      -

This forest is very dense, and made of many types of plants.  There are
vines and undergrowth covering the ground, and gets so thick that you cannot
walk in some directions.  Some of the vines wrap around your body,
constricting your movement, others stopping movement in certain directions. 
As you look up, you cannot see the ceiling, nor a source of light to give
these strange plants life.  You cannot tell where you are, and hope that
your amazing sense of direction will guide you to your destination.  
    You sense a hidden life form in the area.