Ke Meng disguised himself and entered the Ancient Gray Castle, currently the busiest place in the Game World.
The Gray Castle stood in an ancient forest and was enormous, its total area comparable to the administrative area of a capital city. A person in this city was merely a drop in the ocean.
It was built from gray stones bearing strange patterns, and the patterns on every stone brimmed with divine light.
The light was not dazzling. It felt warm, soothing irritation and reducing mental pollution.
The sight of those patterns made Ke Meng tense inwardly, reminding him of that advanced civilization.
By gathering spirituality in his eyes, he could see light soaring into the sky, as vast as a blazing sun.
Every gray stone was like this, with an extraordinary origin. This ancient city had been left behind by that advanced civilization. Perhaps it was a holy city in the darkness, preserving humanity's kindling.
Ke Meng stepped onto the ground of the Gray Castle. It was not jade, but a material he had never seen before. When he swept it with his spiritual perception, the only thing that came to mind was silicon.
Its hardness and flexibility were far beyond what mere silicon could achieve. Even a nuclear bomb detonating on the gray stone could not crack it in the slightest. That advanced civilization must have mixed in something even Ke Meng could not comprehend.
Perhaps even Cthulhu did not understand this substance.
Thus, even if players could move mountains and fill seas, they could not do anything of the sort on the ground of the Gray Castle.
Moving mountains and filling seas was only something they could play around with in areas with low- to mid-level soil.
In high-level areas, even the paving material of a single massive