When I was looking up Elemental powers, I noticed there was more than just Fire, water, Air, Stone, Earth and Ice. Aside from those there is also Lightning, Gravity, Plantlife, Iron, Sonics, Plasma, etc.
I know this is not related to Bionicle but, in “The Legend of Spyro”, the main character was able to conjure fire, ice, electricity, and earth along with a fifth element that is exclusive to his own race as it is unique as it relates to the four basic elements in Alchemy, Aether.
If that is applied in Spyro, wouldn’t it apply to some character who can use more than one elemental power besides the Toa Kaita? I mean what if there is an Aether elemental power in Bionicle or something similar to Aether? What if it is not related to the “Mask of Emulation”?