A snickering sound echoes back, and then the voice says "We rather liiiike it here. The chaos and darkness make it easy for us to feed and escape. Those cowering in the cities are too afraid to venture out to hunt us down, unlike before. We had to be much more careful before, yes...
But this area is depleted, anyway. All of the good prey has either fled to the city, which has grown strong, or is already dead. So yes, we will leave. Have your bird stop its song so my servants can return, and we will leave with no trouble."
As you watch, those goblins who had already been freed from the enchantment begin heading back to the village, and filing into the building on the East side. The psurlon says "They're... disappearing... somehow, Master..."