In this world, there are spirits, humans, and gatekeepers.
Gatekeepers are special humans who have the ability to "know and control" and can restrain spirits.
The spirits are divided into four attributes: water, fire, earth, and wind, which are controlled by the gatekeeper.
Most humans don't know about gatekeepers and spirits, only a small part of the police know about them.
The spirits and gatekeepers are immortal species, and their vitality comes from the tree of life.
The tree of life has a branch called the dark attribute, which absorbs the spiritual energy of heaven and earth and carries the destructive attribute of the tree of life. One day, this branch fell to the ground and was reincarnated into the gatekeeper family. Since then, the gatekeepers have added another category: the dark attribute gatekeeper. They feed on spirits and awaken dark attributes at the age of 25, allowing them to reincarnate into the Gatekeeper family for eternity.
From the moment the dark attribute fell to the ground, the tree of life lost its destructive attribute and began to devour spirits...
Intention: None