Ghost ''shroud'' race

This is a simple idea for a haloween race in terms of balance. I was toying with the idea of having a high number of troops would block more or less vision, but generally players usually reinforce borders before insides so that would have little point:
Race: Ghosts
Special ability description: a 'shroud' is formed behind your reinforced territories, limiting your opponents vision.
Actual ability: Your opponents can only see the number of troops on your borders.
Race: Ghosts
Special ability description: a 'shroud' is formed behind your reinforced territories, limiting your opponents vision.
Actual ability: Your opponents can only see the number of troops on your borders.