The Spearhead                                          -      -     NE 
(-------------------------------------------------)     - <---(M)---> -
                                                        -      S      -

You are in the "Spearhead."  It is named after the shape of the tunnels
carved out of the crystal.  Small pieces of metal stick out of the walls,
threatening to lacerate anyone who moves too close to them.  You continue to
shiver from the unnatural cold and have even more doubts about continuing
this way.  
Some drops of blood are on the ground.