Welcome to “The Spider Farm”, by Stuart Marshall

Before you lays the most unusual “farm” you have ever witnessed. The farm hand who stumbled into your camp and told you of the hideous things that attacked the farm he worked on was dead on accurate about the weird looking creatures. You thought they were only myth. Stories to scare kids into being good. Your myth has come to life.
A degenerate and degraded tribe of the Drow? A race of
goblins favored by Lolth? Or a weird hybrid of the two?
Nobody really knows the origin of these unpleasant blackskinned
creatures, but sages agree that they associate with
neither Drow nor goblins nowadays, preferring the company of
their own kind.
They are real, they are Shadow Goblins.

The Spider Farm, by Stuart Marshall