The Heavenly Lake was located on Mount Azure Dragon in Lan Province. The mountain was a special place in the northwestern region of the Great Han Empire, a place with many legends. One of the most popular legends was about a grandmaster, Hai Cangyue, who trained in seclusion on Mount Azure Dragon to progress into a Martial Emperor seven hundred years ago.
Ever since Hai Cangyue shook the world by progressing into a Martial Emperor, Mount Azure Dragon became the training grounds for countless experts and hermits. After gaining its fame, the Heavenly Lake on the mountain also gradually became well-known due to the frequent duels between the experts.