Command and conquer your ennemies to your hearts' content. Build up your army and plough through the center with your worthy team, where you will be swarmed with arrows from all who opposes you. This is truly the Road to Hell...
Pat Dark Knight
*hint: Because you must pass by the center to attack, you can build towers on your side of the hole. Like this you can weaken any hostile forces entering the hole a little easier... ;)