Cover of darkness
is about the building in necropolis town. For the adventure map location, see cover of darkness (adventure map).
The cover of darkness is special building of necropolis town. It creates an unexplored area around the town for opposing players, which is regenerated at the beginning of the owners turn. The effect is similar to the cover of darkness (a sphinx on a platform emitted the shroud) founded on the adventure map. A Tower town with a lookout tower can (partially) cancel the effect for tower's owner. However, a skyship does not cancel the effect.