What an incredible card for the king of Toughs. It costs nothing, adds extra damage to every attack against them, throws in Overkill and even drags the minion over to engage Luke. If there was a clearer signal that Cage was designed for Protection, I don't think it's broadcasting.
Obviously, this is meant for multiplayer, which is why the Overkill keyword is so excellent. Cage rounds up the problem minions and lets them bounce off his Toughs until a high damage hero can sweep them off the board.