The idea is simple, just add a pet in the market. My idea is that supercell make a Guardian dog that can be bought with elixir to protect our base something like the Barbarian king, but this pet can not be used to attack other bases. This pet can level up and players will have an option to buy a magic crystal that would cost 500 gems, this cristals would be representing an elemental power that will be adquire by the dog when the player buy it. Each element will have damage bonuses to different troops.