Water

Water in populous the beginning is certain death for any unit which falls into it. It is possible to over come this obstacle by by using spells such as Landbridge or Flatten which if casted properly will create a patch of land over the water through which units can safely pass through. Water could also be crossed with the help of Balloons and Boats. Water could also be used to the players advantage by throwing units into it's deadly depths with spells like Blast and Tornado.