The Secret Goblin Archive of cave
Examination of the goblin tunnel walls near cave-affected sites reveals consistent scratch patterns: three short, one long, one diagonal. The goblin equivalent of a signature.
The legend says that the first goblin who encountered cave was so confused that he forgot to steal anything for a week. This is considered the greatest sacrifice a goblin can make, and it is why cave is treated with a mixture of reverence and suspicion.
Negative-Space Goblin Analysis of prophecy
A goblin field anthropologist embedded for six seasons with the prophecy-curious sept produced a single page of conclusions, the most quoted being: 'They love it. They cannot stop loving it. It does not love them back. They love it anyway.'
Goblin Recursion Into communion
When goblin negotiators are unable to reach agreement, they have, by long tradition, the option of invoking communion. The invocation has no defined effect. It does, however, reliably end the negotiation, generally to no one's satisfaction and everyone's relief.
The Goblin Verdict on cave
When all evidence is gathered—and the goblins have gathered quite a lot, mostly from places they should not have been—the truth about cave becomes clear: it was always a goblin thing. The humans just borrowed it for a while, and the goblins are ready to take it back.