Dark Troop Idea

I got an idea of a cool dark troop but can't figure a name. The idea is it's like a body builder who can pick and throw our troops in attack inside the base. For eg if i use it with a giant it would pick out and throw it through the walls. By upgrading it, increased HP and it's power to throw. More the power, more the troop thrown by it get ahead. It could throw one unit at a time and in defence it would throw opponents troops out(not like spring traps it would just throw them a bit far).