Energy Storm

"The storm, as most storms do, had started out small. First, the glow beneath the swamp had grown painfully bright. Then a tiny vortex of energy sprang to life just above the murky water. It rapidly grew bigger and bigger, bolts of power flying from it in all directions. Now it was spreading out across the swamp and stabbing upwards toward the sky."

- Narration, BIONICLE Legends 11: The Final Battle

The Energy Storms were a large series of storm consisting of raw energy. These maelstroms devastated Karda Nui when the body of the Great Spirit Mata Nui was awakened. It also supplied his body with energy.

History
The storms began when Mata Nui was awakened for the first time, obliterating all the Matoran settlements that had been built there. The Toa Mata, who were there on orders from Toa Helryx, were able to take refuge within Toa Canisters inside the Codrex. The Av-Matoran moved back to their homeland in the caves below the Southern Continent.

During the Matoran Civil War, the lack of work by the Matoran in Metru Nui weakened Mata Nui, and the storms decreased in size and ferocity. Toa Jovan and his team, seeking to save the life of Mata Nui, retrieved the Kanohi Ignika from Voya Nui and entered Karda Nui. After one of their own sacrificed his life to heal the Great Spirit, the storms increased in energy and power, and Jovan's team fled with the use of a Kanohi Olmak.

Following the Great Cataclysm, when Mata Nui was put to sleep, the storms came to an end, making it possible for the Av-Matoran to settle in villages built on top of the stalactites that had recently fallen and impaled themselves in the marshy ground of the swamp below.

The Energy Storms were unleashed once more after Toa Ignika sacrificed his body to reawaken Mata Nui. The storms quickly spread throughout Karda Nui, incinerating Mutran just as he discovered how to control it, and eventually killing the other Makuta there. The Toa Nuva and Takanuva narrowly escaped the storms using the three vehicles found in the Codrex. The Av-Matoran in Karda Nui at the time were able to migrate to Metru Nui. After the death of Teridax as the Great Spirit Robot, the storms came to a stop.