Blackthorn Blackout

I don't know what caused the Blackthorn to attack, but I can't allow them to just come in here and take over my operation. Think you could help me out? I'll give you a little something for your trouble. The Blackthorn Droman has three powerful witches that serve as his enforcers. Take them out and you'll send the tribe into disarray. Of course, this could just get their leader to show up and make an already bad situation even worse but I'm willing to risk it.