Jack had used Body Double after sending his minions. Yellow Death's attention was on Therras who was wreaking havoc at the time so he didn't notice when Jack was casting. Jack then sent his three copies out in different directions, in preparation if the enemy's leaders decided to flee.
One of his copies now caught Yellow in his escape path. Yellow instinctively shot at Jack's copy. The bullet passed through Jack's copy as if he was not there. Jack switched place with that copy then and used Blitz Slash. With his Overlimit still active, his five slashes took out Yellow's HP.
Jack looked at where the fighting was still taking place. Death Associates members were panicking now. They were fleeing in all directions. Jack's Spirit Weapon had changed to range mode. Its eight tiny blades chased after the fleeing players and cut their legs to slow them down. Its core then fired a thick beam at those that were slowed.