Camilla had cast the barrier in hopes of hunting down weak teenagers, but now the barrier had turned into a death sentence for her. The barrier wasn't large by any means, Camilla intentionally made the barrier cover a small area for a couple of reasons.
First, if the barrier was diminutive, the chance of someone stumbling on it was next to nothing. And secondly, it prevented the prey from running away as there wasn't enough space to run in the first place.
With seventeen of them, including Kai, Nico, Ashton and the other remaining werewolf, the area within the barrier was already cramped. But with the addition of 10 more summons, Ashton had successfully backed the assailants up in a corner.
"Camilla lower the barrier!" The assassin from before yelled at her.