Here's how the Dragon heads looked in the episode.
Next, is a tiny Lion-O in that blue bubble at the base of the stairs, a tiny Mumm-Ra laying near the pillar on the left. and animating dragon heads.
I was surprised and delighted that The Dragon Hall and The Key of Thundera turned up again in the 2002 Warner Bros/Wildstorm comics Thundcats #1, along with some other elements I designed. But. I'll save that for a future post.