Since it was real, then the one investing in him definitely wasn't that old ghost, the Heaven Suppressing King.
After all, he had previously gone to the Heaven Suppressing King to ask about mental power cultivation methods, but the Heaven Suppressing King hadn't given him a clear answer. Maybe he had one, maybe he didn't, but perhaps there were restrictions preventing him from handing it over. After all, Li Zhen was his junior, and Li Zhen had spent decades researching the brain core without results. If he could have said it, he would have done so long ago.
Yet Lu Hao had revealed it so casually. That meant the one behind him wasn't the Heaven Suppressing King.
But were there other hidden pinnacle powerhouses on Earth?
Anyone below the pinnacle realm couldn't possibly have such resources. Even humanity's Rank Nines lacked storage equipment, and rapidly sealing the gate would certainly require enormous resources.
Could it be a pinnacle powerhouse from the Earth Cave? But they didn't know how to locate the brain core either. Otherwise, their strength would have skyrocketed long ago.
The more Zhang Tao thought about it, the more troublesome it seemed. There was a pinnacle powerhouse hidden on Earth whom he didn't know about.
If that person suddenly went mad, the damage they could inflict on Earth would be incalculable. "I don't know either. If you were investing in someone, would you let them discover your identity right from the start? But it wasn't human, nor did it seem like someone from the Earth Cave..." Lu Hao said gloomily.
After all, he truly had no idea what lay behind the panel. For all he knew, once he progressed far enough down the Path of Slaughter, he might be harvested. He had no way to investigate it now;