Arthron

The Kanohi Arthron was the Mask of Sonar. It allowed the user to sense the movements of objects through echoes, like something moving in the water. This mask could detect invisible beings, so in theory, it could have seen someone using a Huna or a Volitak, but it could not identify details about the object or being.

Kanoka disks made from

 * Unknown

Known Wearers

 * Toa Mahri Jaller