Mahri Nui

Mahri Nui, also known as the Lost Land is the location for the 2007 storyline.

History
Centuries ago, a large fragment of land on Voya Nui sank into the sea. Something in the water quickly began mutating the Matoran, but thankfully the village's impact freed many small air bubbles that they quickly fashioned into protective fields, saving them not only from further mutation, but from drowning in the sea. They soon found that a native kind of Rahi called Hydruka could easily harvest air from a certain kind of seaweed, so they tamed the beasts to do so. Forgetting most of their life on the surface, save for a few fragments, the Matoran named their new home the city of Mahri Nui. They also formed a Council to help everyone work together, Matoran took turns at leadership, and meetings were held monthly to make plans for the future. Every month, Mahri Nui would get fallen gifts from above, but it was really the Voya Nui Matoran throwing tools into the water in rememberance of the lost ones.

Unfortunately, the land sank dangerously close to The Pit, where the Order of Mata Nui condemns the world's most vile beings. Some of those beings, a group of warlords called the Barraki, are now terrorizing the Matoran. Ehlek, especially, wants retribution for the Barraki fortress that Mahri Nui crushed when it sank. However, the Matoran knew little of their attackers, as they never saw more of them than a passing claw or tentacle, they only knew that people kept mysteriously disappearing...

When the Ignika Mask of Life arrived from Voya Nui, things began to change. The Barraki made their presence known to the Matoran, particularly Pridak, who captured a scouting expedition. The Ignika enlarged a Venom Eel to defend itself, and the giant beast threatened Mahri Nui until Defilak shattered its lightstones, hiding the city in shadows. The Barraki then claimed the Mask of Life, causing it to glow so brightly that all of Mahri Nui was blinded by its light. At the same time, a venom eel broke the cord.

Mahri Nui Geography

 * Fields of Airweed: All around Mahri Nui are large fields of Airweed. It was on these which Mahri Nui crashed into, resulting in many air bubbles raising and encasing around the Matoran, saving them from mutation and drowning. These fields of Airweed are harvested by the Hydruka for air, and are watched over by an assigned Matoran. However, the fields of airweed are often exposed to danger, so the Matoran must stay within safe distances.
 * The Cord: A narrow stone cord which links Mahri Nui up with Voya Nui.
 * Matoran Council Chamber: A massive room located in the Mahri Nui Fortress. This room is where the Matoran hold their council meetings to decide on the city's progress and to store the gifts which came from above.
 * The Pillars of Salt: Mountains that formed over the centuries from salt deposits in the water. This area is a preffered hunting ground of Takea sharks and so has not been extensively explored by the Matoran.
 * Octo Cave: A frequent stopping place of the Barraki named Kalmah, this cavern is the source of the sea squid that have plagued the Matoran for so long.