"Surely this is one of the 9 gods. My unseen friend suggested that more salt was needed. Does anyone have any? All of the tombs so far have provided valuable items; I should not like it if we later found that a key piece of the puzzle was left here.
Now, the plaque said 'only a jewel can tame the frog'. We haven't found any jewels on this level... yet.
Might be inside a square skull. Might be salt in there. Anything happen when you shake it?
Could also be that the jewel is in another room, or even in the pocket dimension somewhere.
So, I think we should go looking for that jewel, and once we find it, return here to investigate the coffin. Let's make sure its not in here."
I fly around the pentagram, grab the square skull, and give it a shake. Do I hear anything rattling around in there?