Kingdom Rush Vengeance (Steam) Impossible Hero Challenge - Corridors of the Old City Heroic

The only challenge we're having so far is that the video names are getting so long I'm bumping up against the character limit on YouTube.  I decided to mix up the strategy here and go for an all Melting Furnace setup.  It worked perfectly and the heroes mowed down all the mobs without problem.  Everyone gets to pad their GPA with another 'A' and we continue on.

Kingdom Rush Vengeance Impossible Hero Challenge - Corridors of the Old City Heroic