Jack Clark always had an odd feeling about 'Jonathan Walker'.
When he first exchanged for the Dragon Elephant Overbearing Body Method and heard about the legend of his one year in the Ninth Heavens, Jack inexplicably felt that a battle between them was fated.
That is also why, when Jane Aiken had approached him earlier to reveal past secrets, he didn't reject her offer to help.
Just because he missed the battle between Jonathan's human form and his Purgatory Demon form due to his closed-door breakthrough, Jack hadn't expected to encounter him here again.
Truthfully, Jack only believed a fraction of what Jonathan and Jane had said.
But as the Emperor Dragon Giant Beast began its breakthrough from ancient times and his true body advanced to the Heavenly King stage, all of that didn't matter to Jack—who was set on shattering any of Jonathan's plans.