Some new dragons WIP

I want to do a 7 headed hydra from Jason and the Argonauts movie which is still a great movie, and that I have some Bronze age miniature Greeks that I want to paint up.  I started once again with Safaris toy dragons, this time a four headed Hydra(short 3 heads) so I bought 2 and cut off three heads adding  them on and re sculpting with putty.

I just started the paint job but I think I want to change the color of the chest armor(?)  

The forth head that I had left over I made a sand wyrm bursting from the ground

What do you think?