Witch-House Goblins Curse echo
Researchers at the Goblin Institute of Esoteric Knowledge have classified echo as a Category-4 Phenomenon: 'Real enough to matter, unreal enough to be goblin business.'
The goblin meme cycle for echo ran its full arc in approximately nine days, from 'sincere appreciation' to 'ironic appreciation' to 'post-ironic disavowal' to 'unironic return to sincere appreciation, but with subtle hostility.' This is faster than usual.
Cross-Referenced Goblin Material on cave
A specific tavern song circulating in the goblin warrens features cave as its third verse. The third verse is, by convention, hummed rather than sung, because the words are 'between us and the dark, and the dark would prefer it.'
On Encountering engine
There is a goblin diary, kept in a sealed cabinet in a back room of the Goblin Library, devoted entirely to engine. The diary has eight thousand entries. The latest is from this morning. The diarist is not known.
The Goblin Verdict on echo
After thorough deliberation, the Goblin Honors Committee has declared echo a topic of permanent fascination — the highest accolade short of canonization, and slightly preferred to it by most working goblins.