Puzzle by Antoshka.

Wow, this is another puzzle :)))

There seems to be something messed up with the terrain type under the harpies; the battle takes place on an underground landscape, and after the battle, the post-battle report shows dirt, but moving away consumes 150 mana, which shouldn't happen on dirt or in an underground area. This puzzle isn't really for online players; on random maps, everything is what it appears to be.