After creating the Fourth-Generation Insect Refining Formation, Huo Hai immediately replaced all his original Third-Generation Insect Refining Formations. There was no need to remove formations like these, so the inability to remove them did not count as a drawback.
Indeed, once the two special Insect Refining Formations that merged completely with the soul and bloodline took effect, they could never be removed. Huo Hai did not care. As far as he was concerned, the Fourth-Generation Insect Refining Formation had already reached perfection.
Combined with the Primal Insect Refining Formation, it allowed Huo Hai to handle almost every problem involving the control of spirit insects. However, he still needed a discerning eye. Once he used the fourth-generation formation to control spirit insects with exceptional potential, he could no longer switch them to the Primal Insect Refining Formation. Only spirit insects refined with the Primal Insect Refining Formation had the greatest potential and were the easiest to control.
With the Fourth-Generation Insect Refining Formation, Huo Hai had completely eliminated his previous inability to control spirit insects in large numbers. He had initially wanted to equip every Star Gu with a Fourth-Generation Insect Refining Formation, but after thinking it over, he abandoned the idea.
In truth, Huo Hai controlled the Star Gu through their insect king, Little Star. They were so docile and obedient because Little Star held absolute control over them, and they were constantly steeped in Huo Hai's aura.
These Star Gu could actually rebel at any time. However, the Fourth-Generation Insect Refining Formation still had not resolved the problem of sustaining the formation's own power. Once he applied it to the Star Gu, they would no longer be able to remain outside for extended periods. If some unusual circumstance caused the formations to run out of power and collapse, Huo