Unknowingly, the unity of the Toa's elemental powers released the Makuta from his prison, the viceroy having secretly been working for him the whole time.
The unity of the Toa's elemental powers released the Makuta from his prison. This was unknowingly. The unity of the Toa's elemental powers were having secretly been working for him the whole time. This was unknowingly. His prison was the viceroy.