The three of them could clearly feel the ground beneath their feet trembling slightly.
"The root system of the World Tree can also take root in the underground world..."
Xu Xin looked at the magnificent scenery before him, which he had helped create, and murmured.
"That's right, but it can't spread like it does above ground," Xu Ying said with a hint of regret. "This underground world contains an empty area with a vertical distance of up to three thousand meters without soil. The roots of the World Tree can penetrate the ground of the underground world in this way, and this is almost its limit."
"Isn't the root system of the World Tree able to expand to areas hundreds of kilometers away?" Li Wenxi sensed the vibrations beneath her feet. "If there were no such hollow underground world, could its roots continuously extend downward?"
"I'm not sure about that either, but judging from the situation above, it would probably reach deeper."
Xu Ying looked up at the dome.
