Most of the weird things you encounter around you are man-made; If you encounter a real, scientifically inexplicable strange event, will you still have a fear of the unknown to understand why they exist? Gray, as the intermediary role between black and white, is often able to see the distribution range of desires from the perspective of a bystander. Spells and nightmares seem to be new rules that exist to strengthen the power of the bystander and curb black and white. At the same time, there is also an antagonistic and restraining relationship between the incantation and the incantation; Humans, on the other hand, are the spectators who are recruited by the ether to curb the curses and nightmares, and they are also the gray beings of the curses and nightmares. And in order to control these qualified people with self-imposed rules, human beings have developed two kinds of differences, black and white. And according to this progressive way of [Xuan Zhi Xuan], the new gray ...... It also appeared with the birth of black and white. According to the experience summarized above, or the rules, the birth of gray will herald the birth of new black and white, and the emergence of new black and white will also continue to appear in new gray...... The cycle goes on and on, and it doesn't stop.