Defenses Lab

A lab that provides upgrades that are then seperatly placed on defenses, but only one upgrade may be placed at any one time per defense. These are to counter-act the dark barracks troops.

UPGRADES

Greek: A greek temple gets placed over the defense, obsucring it and providing defense against air attacks until ground units destroy the pillars, reavling the defense (which could still attack) and making it venerable to air attacks. the defense then takes 10 points of damage. When attacked by ground units, both temple and defense take half damage.

Roman: Roman sheilds are placed around the defense, protecting it from ground attack. Air units deal half damage to sheilds and defense, and when sheilds are destroyed the defense becomes venerable to ground attacks.

Advanced: Four towers (one in each corner) hides the defense from enemies, but it can still attack enemy troops. Once the town hall is destroyed, they appear. (costs 3 times as much as the others).

I am open to suggestions for more. Keep in mind that this is to counter-act the dark barracks troops.

Good, but it could be very OP.