Needlebriar (5E)

From publisher blurb: Needlebriar lies in a remote corner of a large duchy. Years ago, war devastated the small halfling community, leading the villagers to commit heinous acts of cannibalism and murder to survive. The violence awoke an ancient spirit who granted the desperate halflings the power to hunt those who dared to harm them. Generations have passed and the halflings continue to hunt the nearby lands, transforming into beasts to sate their hunger. Dancing around raging bonfires, they hold bloody feasts, devouring their captive victims, in worship of the fell spirit of the land, becoming more like wild animals every day as they slink further into depravity. Many of the halfling have the tell-tale shake of cannibalism about them and shuffle about the village in heavy leather cloaks. Meanwhile, the rest of the duchy becomes more and more suspicious.