Jack was glad that Julia had resolved the issue with Grace and Bahamut. He followed her out of the city and listened to her explanation on the area. He found it surprising that the Law Enforcers would do such a thing. He continued to follow Julia until he heard a voice in his head. He looked around and saw a dark shadow wolf. 

"I see it too."

He felt the earthquake but ignored it at first. Then son after he felt another earthquake and then another one a few seconds after. He jumped out of the way and slowly backed away when he saw the huge warm. He watched as Julia, Bahamut and Kiyu all attacked it but it went underground and came back fully regenerated and attacked much more fiercely. Jack had only one option at this point. He sunk into his own shadow and kept jumping into other shadows to constantly avoid the barrage of attacks sent by the worm. Despite being in the shadows he could hear the screams of the warm and he felt his ears ringing. It was extremely loud, deafening even. Once everything was clear Jack came back up and rejoined the others with sheer fear plastered on his face.