Lvl Damage Cost Health Sapper damage (PS)
1 100 100 200 60
2 130 200 260 90
3 190 300 300 110
4 220 400 400 160
5 250 500 500 230
The Spy

I have thought of a troop called the spy. The spy is a dark elixir troop that can be used in battle.
The spy can go invisible for 3 seconds at a time (3 second cool down) and the spy can also sap defensive building making them do half the damage for 5 seconds. Also a spy's Sapper can only be used on 2 buildings in battle.
Spy's take up 10 spaces in the army camps. Tell me if there's anything I need to add to this troop!