Here we are, some basics for his crazy maw.

I've always like the 3-way jaw that the Reaper vampires in Blade 2 had. So that was the major inspiration. The bottom jaw splits in two down the neck somewhat. On the inner parts of these jaws are two bone-like jaw pieces with large fangs on them. They are essentially his Arachnid maxillae, to go with the fang bearing chelicerae that are on the outside of his jaws, near his cheeks.

I made his tongue really long cause...well who doesn't like long tongues?