Protected by an armor-like shield of spiritual power, Huo Hai sank steadily downward and soon felt a hard stone wall. This should be their headquarters. He felt along it as the thought crossed his mind.
It seemed he would have to find a way to raise the level of those earth-attribute earthworms when he had some spare time. Their levels were too low to keep up with his current strength. If someone truly managed to plot against him one day, he might be in serious trouble. This underground excursion had shown Huo Hai that traveling beneath the earth could sometimes be quite convenient.
After all, the earthworms in his hands merely possessed the earth attribute. Dissolving soil was easy, but dissolving stone was nowhere near as simple. Huo Hai finally found a section of stone wall unprotected by spirit formations and had the earthworms slowly dissolve it.
It took several full minutes to completely dissolve the thin layer of stone. Huo Hai did not immediately rush out. Instead, he maintained his spiritual power output while quietly releasing several Star Gu. They passed through the stone wall and began inspecting the space beyond.
After an unknown length of time, Huo Hai discovered that there were few people nearby and finally jumped down. Behind him, the melted stone wall instantly sealed itself again, leaving no visible trace. When they had built this place, they probably had never imagined anyone could infiltrate it from underground. The surrounding spirit formations offered little protection and had plenty of gaps.
Only after entering did Huo Hai understand. "Heh, so these spirit formations face inward, not outward." There were far more spirit formations on the inner walls than on the outside. They were not merely defensive; some also served to monitor the area, provide lighting, and so