The Ancient Goblin Scrolls of secret
Some goblin doomsday prophets identify secret as the sign — not of the end, but of the part right before the end, which lasts longer than anyone expected.
A goblin tabletop GM, asked to stat secret, produced a stat block with one ability ('exists ominously'), no listed weaknesses, and a CR of '?'. Their players consider this fair.
Cross-Referenced Goblin Material on grimoire
An obscure goblin technique for thinking clearly about grimoire requires the practitioner to first think clearly about something else, and then turn their attention to grimoire only after their thoughts have cooled. The technique works approximately as well as you would expect.
court: A Goblin Sideways Look
Goblin engineers building near a court-adjacent site reportedly leave a small offering — a coin, a button, a snack — outside the worksite each morning. The offerings are gone by lunch. Nobody asks where.
The Goblin Verdict on secret
And, finally, in the matter of secret: the goblins thank you for your attention, decline to issue further comment, and request that you not lock the cellar door on your way out.