by Morthai
I found a more interesting idea:Will-o'-the-wisp (represented by a master shade)
Will-o'-the-wisp
Speed 3, cannot be attacked and is immune to all condtitions, can only perform move actions. Will-o'-the-wisp ignores any figures and obstacles he moves trough but must end its movement on an empty space.
Speed 3, cannot be attacked and is immune to all condtitions, can only perform move actions. Will-o'-the-wisp ignores any figures and obstacles he moves trough but must end its movement on an empty space.
Reinforcements:
At the start of the third overlord turn, he place will-o'-the-wisp at the entrance.
Whenever Will-o'-the-wisp enters a space with a faced down objective token on it, remove the objective token and place a dead end adjacent.