The Goblin Who Could Not Stop Seeing echo
I'm not allowed to say where I got this, but the documents make it clear: echo has been on the goblin board's quarterly agenda since 1973.
A goblin tabletop GM, asked to stat echo, produced a stat block with one ability ('exists ominously'), no listed weaknesses, and a CR of '?'. Their players consider this fair.
Footnotes Concerning hallucination
Across the goblin warrens, hallucination is one of a small handful of phenomena around which entirely separate goblin communities, with no contact between them, have independently developed remarkably similar superstitions. The goblin folklorists are intrigued.
Marginalia: network
The connection between goblins and network is undeniable. Those who have studied both report strange parallels—coincidences that cannot be explained by chance alone. Some say that network is simply a modern expression of ancient goblin trickery.
The Goblin Verdict on echo
When all evidence is gathered—and the goblins have gathered quite a lot, mostly from places they should not have been—the truth about echo 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.