The Story

Hiei also has an implanted eye called the Jagan on his forehead. It is also known as the Evil Eye.

• It was implanted in him when he was searching for his lost Hiruiseki stone and the Hyouga tribe, that tossed him over the cliff, hence it's tracking abilities.
• The Jagan allows him to manipulate Level E humans and Level E demons. Mean very weak demons and humans with very little or no spiritual abilities.
• He can use them to his advantages as well as read open minds unless there is a mental barrier or an unknown source of power to prevent him from doing so otherwise.
• The Jagan is often used to lure and assist in summoning the Dragons.
• Telekinesis is also something he is capable of at certain times. That also includes binding people. It was obvious when Yuusuke tried to overtake Hiei and he used his Jagan's binding abilities to make sure Yusuke was trapped and unmovable.
• Telepathy is common for those with the Jagan as well.
• He can also erase memories like hypnosis. It was showed in the last few chapters of the manga when he specifically Jagan eyed a human and fixed his memories and sent him.