A flash done by http://bloodlust-carman.deviantart.com/
I am very impressed with this, but I forgot to tell her to put something into the flash that I will post here:
Serthal's spine and wrist spike can expand and retract at will. The spine will be standing up if in a state of heightened emotions or a fight, and will lay relaxed against his back for the most part. The spike has an almost clear webbing between the scales and the spike to allow it to snap out and back.
With that said and done, go watch her! And commish her!