>>16358801You can't see it in this picture, but I compromised a bit.
Being very bulky and spiny, as you can see, what in the world would he need to protect?
The answer: His neck bulge. It's very fragile, but from behind the defenses of his neck frill, he can spew flames/smoke/poisonous gases from the bulge.
I also gave him the glass tail, as you can see, along with an overall bulkier body, and made the spike placement more reminiscent of his previous form.