This weapon was created by an unknown Toa of Sonics, yet neither Davix nor any of his friends know this. It is a special spear that can shoot both sonic powers and the users element out of it. It can also be played as a guitar which what Davix is doing in the picture below.
It is a great weapon, and Davix would use no other weapon if given the choice. Davix is pretty protective of it, which is why he gets VERY steamed if his brother Callan is messing with it.