the invisibility troop

Sorry for my english, im spanish. Why dont you put a type Of troop like ghost? Any defense cant see this troop only the x-ray his favourite object (of the troop) is the.town hall you can agree this in another type of barrack with another type of supply or dark elixir this troop havent got more levels only you can personalize the velocity or the strong or the visibility can you understand me? If you do that youll can get bigger the game this troop we can unlock in the town hall number 7