Bionicle 3: Web of Shadows (2005)

Storyline:
The Toa Metru return to their glorious city of Metru Nui to finally accomplish their mission, only to find the city in ruins, overrun by the dreaded Visorak horde. Captured by their new enemy and transformed into hideous Toa Hordika, our heroes must find a figure out of myth to be cured of their mutations and fulfill their destiny before the beast within overtakes them.