Heartstone                                             -      N      - 
(-------------------------------------------------)     - <---(M)---> -
                                                        -      -      -

Resting on a fifteen foot wide platform of ashen stone rising from the
depths below is the Heartstone: pulsing, draining, giving life.  The world
has turned red, and the prayers of multitudes and the timeless shrieks of
the fallen swirl around the room.  The only thing unchanged and motionless
is an obsidian door rising from the stone.  It stands free of any wall, and
only empty space lies behind it.  You shudder to think what lies beyond this
doorway, and feel glad that there is no apparent way to enter it.  
Iana has arrived from the north.