This hall is dominated by the assembled skeleton of a massive T-Rex thunderlizard. The skeleton is huge, taking up most of the hall. It is positioned rearing high on it's back legs, massive jaws wide to bite.
When you cross the threshold into the hall the Thunderlizard roars a greeting in Old Annish
"Gaze here and wonder, visitor, on the mightiest creature of Annwyn that was, and is Now Lost