While Hellion was waiting outside, Oriya had gone inside to search for Claudia. Those moments were like raw torment for him who had the habit of dealing with everything himself especially now that it involved her, his hazel-eyed sun-faced. Standing there and being unable to do anything when he knew she was in some sort of danger, it was sending him to an edge.
A barrier couldn't be casted over the main entrances because they were used by everyone but it was obvious that it must be around the whole chamber so it was useless to try and get in from inside or even try to break the walls. He just had to wait, one of the most painful things to ever exist both for humans and creatures with super-strengths. It was because waiting involved time, something no one was ever able to defeat.