"Leinad has always been attracted to trinkets from the occult, whatever the culture.
In this case a crafted a mask full of fiendish desires. It pulsates and ignite thick darkness absorbing the light into pitch black.
This strange presence has been closely associated with distressful and evil emotions. To better understand why they are so feared, the legends say that the Oni lurks around the dying, waiting to rush the souls of the departed straight to hell as quickly as possible.
As far as demon hierarchy goes, the Oni have little in the way of rivals."