Farusei

The Kanohi Farusei was the Unholy Mask of False Divinity. The Makuta Scryptorek is it's creator and only wearer, and aside from it concealing his true form indefinitely as long as it is worn, the Farusei's other powers, if any, remain relatively unknown.

It was destroyed or otherwise lost by unknown means before the events of Bionic Fantasy.

Trivia

 * Even a Great Kanohi Rode could not pierce the illusions created by the Farusei.
 * The Farusei(in toy form) was made up of a Kanohi Vahi, which Scryptorek seeks, and an Okotan Protector Mask, and would be near impossible to attach to any head piece type.
 * The mask's name is made up of "farusu", the Japanese romaji for "false", and "sei", meaning "holy/divine" in the context of the mask itself, hence it's description as the Mask of False Divinity. It's name also seems to recall the similarly pronounciated "fal'Cie" from Fabula Nova Crystallis Final Fantasy subseries, supernatural beings who mostly have agendas just as despicable as that of Scryptorek.
 * It is unknown is this is Scryptorek's original mask, or if he previously wore another one which he discarded in favor of the Farusei.
 * The Farusei, despite it's existence being unknown to nearly everyone except Scryptorek himself, would certainly be condemned as an immoral mask by Toa for it's power(s) and it's association with the Makuta; thus the mask itself and it's name have come to be synonymous with deception and hypocrisy, like how Roodaka's name became an icon of treachery.