Mahri Nui

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

History
Mahri Nui was created when molten protodermis flowed into the Voya Nui Bay and hardened. The Matoran built a village there, but three hundred years ago, it broke off of Voya Nui and sunk below, falling directly on top of the Pit, a place where the Order of Mata Nui sends rebel Order members and other beings beyond redemption. Later, more molten protodermis flowed from Voya Nui to Mahri Nui and hardened, which fastened the previously-floating Voya Nui to the sea floor.

When the island fell, the Matoran survived by breathing in bubbles that rose up when the island fell due to landing in a field of airweed. Mahri Nui went into a huge bubble, and the Matoran began using herd animals known as Hydruka to harvest the airweed.

Unfortunately, the island had fallen on and crushed the fortress of the Barraki, six warlords residing in the Pit. The Barraki have been attacking Mahri Nui since then.