"This fog… It's more like a wall." Standing on the deck, Yun Lintian reached his hand out to touch a thick wall of fog in front of him. It was hard and sturdy, just like a solid wall.
"Many experts tried to break it several times in the past, but none of them could succeed. Up until now, no one could understand it." On the side, Nantian Lingyan said softly. Although she had never come to Heaven Vault Island before, she had studied about it a lot and even had a map in her possession.
"Aside from the realm restriction, is there any other?" Yun Lintian retracted his hand and asked.
"Not really." Nantian Lingyan responded.
"What do you mean?" Yun Lintian was puzzled.