The third eye on Hiei's forehead in "Yu Yu Hakusho". Hiei was born in the land of glaciers. He was abandoned because he was a taboo son. In order to survive, he kept robbing and killing. In order to find Sister and his own ice tear stone, and asked the demon plastic surgeon Shigure to transplant the evil eye. To transplant the evil eye, you have to sacrifice your own demonic power. If you use it well, your demonic power will be increased several times. Feiying put on the evil eye to find his sister. The evil eye can see every corner of the world. The evil eye can also transform it into the evil eye king, with eyes all over its body, and it can use various moves starting with "Fire Kill". Since Feiying is a fire demon, the highest move is the black flame - flame. Kill the black dragon wave.