The Mask looks dark gray and seems to have orange and dark red eyes.
Hundreds of years ago the nine Oni generals were sealed in masks, where they were helpless and could not use their powers.
In Half a Mask of Kung-Fu, his mask was put on sale by a man called Alfie on www.alfiesantiqueauctions.com. It was then bought by Valmont. The mask was split in two by Hak Foo, Valmont wearing half of it and Jade the other. At the end of the episode, Jade removed Valmont's mask and Valmont removed Jade's.
In Ninja Twilight, after the nine masks was joined together, all of the Oni generals were freed and tried to destroy the world. Number 7 was walking with Number 8 to one of the four corners of the earth. They were briefly defeated by Viper but Tarakudo managed to capture her. After Jade put Tarakudo's mask on his face, all the Oni and Shadowkhan were imprisoned within.
- Ninja Twilight