Maybe the group Loren called the Shorn Crescent? If the point they were trying to make is that they can take whatever they want...

[And chillingly, that they didn't have to take anything. They left the food and all of the other trade goods one might have expected them to need. It would have been trivial to vanish at least something. But they'd only taken the women.]

I think it would have taken a group of Blood and landen working together. Even some of the Hunters are missing.