A swarm of Star Gu guarded Huo Hai while killing some of the more troublesome undead nearby. These Star Gu were tiny, and even someone at the same level would have a hard time dealing with them.
That was especially true of these undead, which had no real thoughts of their own. More importantly, even undead creatures that had reached the Spirit King Realm and could draw on the power of heaven and earth had no spiritual energy themselves. They fought using the strength of their bodies and bones, with no spiritual energy to protect them. Against undead like these, the Star Gu were practically their natural bane.
As long as they failed to dodge in time, the Star Gu could easily bore into the skeletons' heads. After that, a single strike meant certain death, with no room for any further resistance. The lack of a spiritual energy shield was these undead's greatest weakness.
Besides that, Huo Hai's own attacks were not to be underestimated. While the Star Gu attacked, Huo Hai also struck at the undead around him, whether they were in the Spirit King Realm or below it.
Whenever Huo Hai and the Star Gu struck, they killed in a single blow. Seeing this, Yin Bone King frowned, but he was not worried. "Hmph, nothing but a dying struggle. Let's see how much spiritual energy you have to squander."
He had at least tens of thousands of undead creatures in the Spirit Marshal Realm under his control. With his spells enhancing them, each carried a trace of the power of heaven and earth. That power was not particularly strong, but Huo Hai could not ignore it. Every attack consumed his spiritual energy, and given enough time, he would surely be unable to withstand the onslaught of the power