While his enemies came at him in drove, Jack was still thinking about how he should proceed after receiving the message. He was glad to have received the message. Otherwise, he would have needed to rely on the Themisphere Beacon Stone once his other magic tools were used up.
He cast Barrier to allow himself more freedom to think about his approach while continuing to trade blows with his opponents.
When his Barrier expired, his opponents suddenly backed away.
'Hm?' Jack was baffled by the act. His surrounding was suddenly devoid of players. His Pyro Lynx went on and chased over the retreating enemies. Since Jack was not suffering any damage at the moment, that summoned creature had free rein to do as it pleased.
The retreating players revealed another group of players lining up not far ahead. Bigarm was among that group. Jack had been wondering where the guy had disappeared to. He was planning to do what he should have done in the past when he had first encountered the guy.