One use only. The banner can be activated at the beginning of any player's turn. No flying movement is allowed across the entire battlefield and missile fire is at -2 to hit. All non-magical missile attacks that don't use BS to hit their target need to roll a 4+ on a D6 before they can fire. Roll a D6 at the beginning of each following player turn - the effects of the banner will end on a D6 roll of 4+.