Makuta Ignika

But you have to remember that whilst going to voya Nui, they got their old matoran kanohi taken by Karzanhi and (for instance) Jaller got his Hau replaced by a Calix,which got transformed into an organic form when the Red Star's lightning hit Jaller's canister when they got to Voya Nui , turning them into the Toa Inika.

. And you could just turn random people into dark people of shadow to your command !