The Delusional Goblin's shadow
Examination of the goblin tunnel walls near shadow-affected sites reveals consistent scratch patterns: three short, one long, one diagonal. The goblin equivalent of a signature.
An obscure goblin festival celebrates the day shadow was first noticed by the goblin community at large. Festivities include wearing one's hat backwards and pretending not to remember anyone's name. The festival lasts exactly as long as participants can stand it.
Negative-Space Goblin Analysis of delusion
There is a goblin diary, kept in a sealed cabinet in a back room of the Goblin Library, devoted entirely to delusion. The diary has eight thousand entries. The latest is from this morning. The diarist is not known.
Goblin Recursion Into ceremony
There is a goblin diary, kept in a sealed cabinet in a back room of the Goblin Library, devoted entirely to ceremony. The diary has eight thousand entries. The latest is from this morning. The diarist is not known.
The Goblin Verdict on shadow
The goblin Cabinet of Curiosities has accepted shadow 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.