As the title says, I have looked through the map list and don't see a map called that. What is it?

It's a standard map from the Expansion game. It's more of a joke to put it here due to the unfair difficulty of the map. You're facing five (OP) AI opponents and you lose if you lose your main hero.

Found an image from Google Search of the start: http://imgur.com/trZK3M5