Sub-Zero Spear

The Sub-Zero Spear is the Toa Tool which Toa Kualus uses. He uses it to channel his Ice powers. He lost it when he was mutated into a Rahaga by Roodaka, and regained it when she mutated him back, after the Toa Nuva told her if she didn't, they'd let a Tahtorak and a Kanohi Dragon destroy her home and her too.