Hello,
In the scenario, there are 2 big statues protecting the path to the forge of the Overlord.
Well, it's only after you approach them and they attack you, after the batlle is won, that you receive a message from the queen if I remember well, that warns you that you should be carefull with those statues cause they are not simple statues, they can move.
It would be better if this message would appear before the battle, when you are, for example, 2 squares from those statues.