After getting the information he required from Autarch, Jacob also inquired about the Soul Star Watches since he didn't find any on these guards.
He was hoping to gain access to the Virtual Star World so he could get a better understanding of the current situation. But to his dismay, he learned that the Myriad Galaxy King had already taken away everyone's Soul Star Watches to ensure they wouldn't spread this news outside. He even used a unique formation to cut the connection with the star network.
After all, if the others learn about the Myriad Galaxy King's actions, the other factions and even the Alchemy Guild will not let him off easily.
Nonetheless, Jacob had already decided to get rid of the Myriad Galaxy King and use him as a catalyst to help Autarch evolve. Furthermore, he learns that the Myriad Galaxy King wasn't a peak legendary king. Instead, he seemed to be a Tier-2 Legendary King who was a step away from reaching Tier-3, which meant he was far weaker than Jacob.