This was the Thunder City of Lei Kuanglong, an Utmost Treasure that was handed down by the Old Master Thunder directly. It could be used to refine one's physical body. If one were to cultivate their martial arts mystic skills within it, one would be able to soar even further.
Lei Kuanglong was right in the midst of cultivating a supreme mystic skill when he sensed the disturbances at the Disciplinary Hall caused by outsiders. Naturally, there was no way he could endure something as such, and he came out of his seclusion to check it out.
Within the Thunder City, Lei Kuanglong's aura was not the only one there. There were the auras of several other Vice Hall Masters.
