Cult of the Black Lamb
A cult that had infected the town of Raless, secretly killing travelers who were not considered "one of the sheep" The Shepherd was their leader and he directed them to find the black sheep's of the flock, as those black sheep were keeping the flock from going to the Eternal Pasture upon death. The Shepherd proclaimed himself as immortal while secretly using the death of these so called "Black Sheep" to magically extend his lifespan.
After member of of Cult of the Black Lamb attempted to capture our party, they were defeated, made to spill their secrets and brought them too the cults cave, where like lambs at the slaughter, they were wiped out.
From Hyms of the Shepherd
"And who cares for you in the rain? And gives up sleep to see you dry?"
"And who guides us untoward the unfading light?"
"Who feeds us, cares for us and takes us under his protection?"
"And who i ask rids us of the foul black lambs that come into our home, bringing in their outsider ways?"
"And with the slaughter of the black lambs, who shall live eternal, guiding our souls untoward his eternal pasture."