Energy Storm

When the Great Spirit Mata Nui first came to the universe, a massive storm of pure energy appeared in the Core of the Universe. Upon reaching its full strength, the storm was powerful enough to destroy any structure or living thing in the Core. As such, the Av-Matoran living in the Core had to leave, and the Toa Mata, also present, were only safe from the storm as long as they were within their Toa Canisters inside the Codrex.

In addition to Mata Nui's arrival, the storm was expected to make one more appearance; when the Toa Nuva finally awoke the Great Spirit from the sleep he was put in by the Brotherhood of Makuta, Karda Nui would once again be devastated by the storm.