Giyon looked at the opponent in surprise. She has never seen him or heard of him, but from the looks of it Sam knew who he was and she could speculate who sent this guy.
But those speculations are what shocked her. If he belonged to either Sivan or the League, they wouldn't normally dare to come inside and attack Sam, but if someone still came, they are either mad or they completely lost hope on their life and wouldn't mind giving it away like this.
Sam's barrier worked better than Giyon's barrier as it repelled all the poisonous gas.
The man in the white robe took out some darts and started throwing them towards Sam. Even though Giyon is his toughest opponent there, he didn't care, his target was Sam and he decided to focus on that one target.
Sam channeled the energy through the staff and shot energy bullets at the darts, even before the darts made their way to the barrier, the energy bullets reached them and exploded.