Oni Masks

Oni Masks originate from Japan and were created by good Chi wizards to seal Oni generals within. The masks were then scattered to the four corners of the Earth. Oni Masks can each summon a different tribe of Shadowkhan once the mask is attached to a host's face, but if all nine Masks are brought together in one location, the Oni spirits are set free, summoning enough Shadowkhan to engulf the Earth in eternal darkness. It is interesting to note that half of the masks accidently fell on peoples faces (or were sat on in Ikazuki's case), three were put on willingly, one was never worn, and one was forced upon a face (Tarakudo).