According to the information that Ling Han had obtained, there were a total of seven levels of Yang Soul Stones. From bottom to top, they were red, orange, yellow, green, blue, indigo, and purple.
Which also meant that the Yang Soul Stone had to reach the third level to be able to accommodate a divided soul, or it would shatter in the process of "hatching". That would naturally mean that breaking through to the Dividing Soul Tier would end up in failure.
No wonder breaking through to the Dividing Soul Tier was so difficult, because one would have to kill a powerful great living creature the likes of the giant octopus. That was a Yin Soul Tier-level existence, and even a fourth severance emperor tier could only flee if they met with this kind of creature.
Thus, aside from monarch tiers, they could only kill small fish, and hope that many little drops could make an ocean, which made breaking through to Yang Soul Tier extremely and incredibly difficult.