Only if the stone above was moved, the sky here would not be so dark, and the light could shine through.
For ten thousand years, when the Devil Emperor came, he too tried to move the Ancestral Stone, but ultimately, he failed. Before her demise, the Earth Mother sealed the Ancestral Stone at the peak of Demon Spirit Peak. If the seal were broken, it might unleash a power capable of destroying the world. Fortunately, that fool Xi Feng placed it in this region of the Central Continent, and the space above is where the spatial rifts appeared when the Devil Emperor tore through the space.
Otherwise, this black fog would have been enough to turn the entire Central Continent into a hell on earth.