"The Toa of Stone shrugged and casually tossed the rock aside. Only Matoro noticed it hit another rock, ricochet, hit a second, and so on. [...] The boulder ricocheted one last time and slammed into Vezok's back."
The KanohiSanok is the Mask of Accuracy. It allows its user to turn virtually any inanimate object into a projectile weapon and hit almost any target they aim for. A Kanohi Sanok is always on at a low level.