DEFEND THE CITY

In the skies above Heart City you may see a blimp armed with canons.  This is the Iron Blimp.  Owned and operated by the Department of Monster Management, the Iron Blimp is a sentinel in the sky.  It is made of metal mined from the Crystal Artery which makes it both strong and light.  It has canons that fire high power energy beams to dissuade attacking monsters.