A very rushed entry for a little contest on Deviantart. (Made in about an hour)
The "Element Guardians" as they call themselves are a group of eight powerful wielders of their corresponding element. Their purpose is to keep the world in balance and intervene when needed.
They have the abilty to use their element to its full potential even greater than a Toa Nuva.
"The Light Guardian" has the power to blind everybody by taking away the light away. It can also change a entity personality by changing the amount of inner light he has. Moving with the speed of light can make him appear everywhere in any second.
Legends says he and the "Shadow Guardian" live in perfect harmony and keep changing the day into night and vice-versa