The Toa Killer is a Mukuta Robot, that has one purpose to kill Toa. They have a program that is capable of adapting to their target, and it also makes them harder to kill. They have a 'Brain' for lack of better term, housed in their chest.
This variation of the Toa Killer has a laser rifle as a Primary weapon, and two short swords as a secondary weapon. He carries the two swords on his supply backpack, that also houses a grappling hook. It also has a mask of
Filtration, which has the power of a gas mask, for the simple explanation.