Battle of Aqua Nui

The Battle of Aqua Nui was an underwater battle between the Brotherhood of Makuta, led by Makuta Teridax, and the Toa Aqua and Matoran Nui of Aqua Nui for the The Staff of Nui.

The Staff/Teridax's Wish
The Staff of Nui was put under the city of Aqua Nui by the Great Beings at its building. Teridax wanted its great but unknown powers, and so he finally led his men underwater to attack the city.

Battle/Destruction of Aqua Nui
Teridax promised not to harm anyone but to only take the Staff and leave. But he had stolen six Matoran, Wole, Cij, Delos, Melgav, Alg, and Sant, to mutate and use as servants of the Brotherhood. Mata Nui saw this and transformed the Matoran into the Toa Aqua.

The Toa Aqua gathered the Matoran and fought the Makuta with the Matoran merged into Matoran Nui. Many from both sides died, and Teridax finally laid his hands on the Staff after blasting a ball of shadow at Toa Cij. Cij fell into "the Pit," and Teridax fired a great energy ball from the Staff at Aqua Nui, destroying it. Toa Wole and Toa Melgav were killed along with many Matoran in the blast. Teridax and his men then left with the Staff.