This new piece is to try out an idea I have had to make suits of armour with interchangable decorative additions. So the main suit will be reasonably plain and then you choose the style. On the lower leg piece I have done, the skull knee can be taken off and a new decoration put on. I will do the upper leg armour next and then make another knee decoration.
The skulls mouth opens and closes as you bend your knee. This was sculpted in clay, then rough cast and cleaned up.