There are five Patriarchs of the Five Elements. Tens of thousands of years ago, one of the Patriarchs fell into the devil's path and became evil because of his unfaithful cultivation. The demons came to the human world to cause trouble, and the world fell into panic for a while.
The other four ancestors worked together to finally destroy the demon world, but in the end they ran out of power and were swallowed up by dark energy and died. Their descendants sealed the exit and have been guarding the world.
Over the years, the sealing ability gradually weakened. Many people were deceived and fell into the devil's way, secretly helping to unlock the seal. When their descendants found out, they immediately found and killed them all.
Times have changed, and more and more people have begun to 'help' to prevent the invasion of demons in order to ensure the stability of the world. They know that the existence of demons is due to a disaster. At that time, demons first entered the world and killed many people. Fortunately, some brave people with supernatural powers stepped forward, otherwise they would all have died long ago. No one knew the existence of their descendants at that time.