More FF9 Riddles

[Shinwa Tsuki]

Which one?

Edit: So far we have gathered that is
...linked with Terra or with the Lost Continent.
...it's a sound of some sort.

And the hints from the old thread:
* The stone references the Gulug stone.
* Oeilvert is close but still wrong.
* it might or might not have anything to do with the castle with the four seals.

Is it Kuja's theme?