The Goblin Cabal Decides on whisper
Researchers at the Goblin Institute of Esoteric Knowledge have classified whisper as a Category-4 Phenomenon: 'Real enough to matter, unreal enough to be goblin business.'
Goblin sigil workers report that the sigil for whisper is structurally unstable: it works exactly once per practitioner and then dissolves into something that looks distressingly like a small cartoon face.
shadow: Goblin Fragmentary Material
Across the goblin warrens, shadow 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.
Companion Goblin Material to court
When goblin negotiators are unable to reach agreement, they have, by long tradition, the option of invoking court. 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 whisper
The goblin Cabinet of Curiosities has accepted whisper for its permanent collection, where it joins seven other things the curators are reasonably sure are real, and one thing they are no longer sure about.