Onewa lifted his eyes, rage filled his heart.  He triggered his mask power, but not to try to control the Rahi Nui.  No, this time he sent his mental energies like a lance into the monster's brain.  What I can control, I can destroy, the Toa of Stone thought darkly.
The Rahi Nui paused, feeling something strange coming over it.  Then a pain more intense than anything it had ever known exploded in its mind.  The beast bellowed and staggered as the power of the Mask of Mind Control tore through its thoughts.

Maze of Shadows, Greg Farshtey, p 66-67