Shards of the Shattered Pact: Seowyn's Crossing
Once in a while, a particularly vile Goblin or Hobgoblin parent will be especially “blessed” by a demonic patron. Their offspring will infused with demonic blood and an affinity for wolves. Eventually, they learn to shift their forms between their parent race, a dire wolf, and a terrible amalgam of the two. These monstrous creatures are barghests, priests of wanton slaughter and evil deeds.