King Yoblan was the great-great-great-grandfather of the current king of Malani's Haven. He apparently made a network of underground tunnels that he could flee if needed in a time of great political unrest. The fact that he ordered the tunnels to be dug showed that he was indeed afraid for his life. They were found by Queen Hamsha when she was a girl exploring the palace, and when she came of age she researched their origins. ("Destruction of Illusions")