Sonic Creature

The Sonic Creature was a Rahi made completely out of sound. The Toa Metru encountered this beast while saving the Matoran from the Makuta of Metru Nui's Sleep Spheres. Toa Matau got rid of it by first ordering Nuju and Whenua to put up airtight walls,then draining the area of all air and throwing a rock at it,causing it to dissolve. The Sonic Creature could create sonic booms by throwing itself at a wall.Its powers might have had something to do with the mutant Lohrak (that the Toa Metru also battled with)'s sonic scream.