Yang Yu asked Yi Zuo about the whereabouts of other Underground Mazes created by heroes, to which Yi Zuo gave a response similar to Scarjade's: except for a few special Underground Mazes, the others appeared randomly.
However, the locations of Underground Mazes constructed by heroes never overlapped, and within a one hundred kilometer radius centered on an Underground Maze, it was impossible for a second one to appear.
When asked about the number of mazes, Yi Zuo admitted he was powerless. Before he had decided to become the Guardian of the Hall of Courage, there were already halls of Magic, Wisdom, Strength, Defense, Speed, Skill, Cooperation, Strategy, and Tenacity; he didn't know whether any other mazes had been constructed after the heroes had awakened him.
