Quake Breakers

Onua Nuva carried twin Quake Breakers, chainsaw-like tool that he channeled his Earth Elemental Energy through. They could also dig through earth and rock easily, and could even attach to his feet to serve as all-terrain treads. Later he replaced them with his Multi Resistant Shield when he received his Adaptive Armor.

Trivia
The Quake Breakers, in spite of being Onua Nuva's primary weapons, only made two brief appearances in Mask of Light: The Movie. Once while Onua is chatting with Pohatu, and once when the Toa form a protective ring around Jaller and Takua at Kini-Nui. Instead of his Toa Tools, Onua simply used his hands to channel his elemental power.