Long before the events of The Stones of Destiny Arc, a Toa of Light named Jaaru helped stop an ancient threat by sacrificing his life. However; being the only Toa, he realized that with his passing there would be no more Toa to protect the Matoran and the world from danger. Learning a technique from the Great Beings to store his power, he created five Toa Stones to create a new generation of Toa. Once created, he hid the stones all over the world, where he believed only true Toa would be able to find them. His goal of assuring a new generation of Toa complete, he then sacrificed his life.