|LEGO → TECHNIC → BIONICLE → Toa Nuva|
8566 Onua Nuva is a BIONICLE set released in 2002. He is one of the six Toa Nuva. He is armed with two Quake Breakers that can be attached to his feet to become all-terrain treads. He wears the Pakari Nuva, the Nuva Mask of Strength. He has armor on his body and shoulder plates covering his shoulders. In the BIONICLE Universe, he was a Toa Nuva of Earth and had remained silent when the Toa Nuva split up before the Bohrok-Kal were released on Mata Nui. Onua is the strongest Toa Nuva and has a realm similar to Pohatu's. The set is Onua's second appearance in set form.
- Turning the gear on his back will cause his arms to rotate.
- Onua Nuva could transform into a Toa Nuva Kaita by combining Tahu Nuva and Pohatu Nuva with Onua Nuva.