Mask-Making Laboratory

A Underground facility Found and used by Toa Nuiden after the events of Chronicles of Chaos.

Uncovering
Toa Nuiden being one of the toa in charge of the underground tunnels he went on many missions in them. On a scouting mission he found a secret underground facility with a mask making chamber, and a few supplies for great kanohi masks.

Nuiden's Use of the Facility
Nuiden Used the facility and its supplies along with his skills and knowlage of mask making to design and create what he defined as: The Greatest Kanohi masks ever created by matoran or toa. He left messages puzzles and clues on what to do upon his death for his teammates. After sealing off the facility he covered it up with a historical document he called "The Chronicles of Chaos." and Incrypted a message Spelling "Hope", with the use of his Inkari.

History
Little is known about the facility even by the last ones to use it (The Toa Inkari, Toa Narok). They assumed that it was a facility used by matoran or toa to create new toa, or just a simple mask making facility and that it was only chance that the supplies for a Noble Mask were there