Gatris Nui (being)

You may be looking for the Island,Gatris Nui.

Gatris Nui was a Great Spirit sent by the Great Beings in the ancient past to protect the Universe from Shadowspace and other realms.He is considered to be an friend to Mata Nui and helped the First Toa create the Nui Orbs a long time ago since he has no real form and can't do it himself.

History
Gatris Nui,like his fellow Great Spirits,originally were sent by The Great Beings to Karda Nui.Laksuj-Konom and Mata Nui went off to somewhere by themselves,while Gatris Nui,who had barely met his brothers before,had gone to a small volcano rising out of the endless sea.He then raised an enormous island around it,and settled down there.Soon after,a group of Matoran came to the island and settled down to form the cities.After that,Makuta of Metru Nui came,as he had been following Gatris Nui ever since The Spirit had been sent here.He then made the island his fortress,and created the World Schism to study Shadowspace.Mata Nui was greatly angered by this,and he ordered Gatris Nui to seal it up.Gatris Nui,with the help of the First Toa,created the Nui Orbs,which stopped the World Schism from growing,but it was still there.Mata Nui said it was good enough,until they could figure out how to permanently remove it.During The Great Cataclysm,Gatris Nui was greatly weakened,along with his brother,by Makuta.The Toa of the island had to help Gatris Nui somehow or the Nui Orbs would break and the World Schism would engulf the entire Universe.They succeeded,but He was still very weak and so The Toa of the Island went to Karda Nui to try and find the Toa Nuva and help them save Mata Nui,who would then save Gatris Nui.

Trivia
Toa Lhikan is believed to be some form of Gatris Nui,but this remains unproved.