if you add thease expressions to all layers in your dragon but the Leader (probably the head). and cread a solid Titled “Dragon Control” and add the slider effect to it. now your body parts will follow the motion of the head of the dragon. you can adjust the follow distance with the slider on the dragon control layer(by the way you should make this layer invisible) .
Position expression:
thisComp.layer(index-1).position.value_at_time(time-thisComp.layer(“Dragon conrol”).effect(“Slider Control”)(“Slider”))
Rotation expression
thisComp.layer(index-1).rotationY.value_at_time(time-thisComp.layer(“Dragon conrol”).effect(“Slider Control”)(“Slider”))
Note:this teqnique was taught to me By Ben Ungren, a toutorial contributor on creative cow, he taught this to me in his after effects cource At brigham Young University. He, however, learned this from some one else. I’d like to give credit but i have no Idea who to.