toa nitron is the toa of nitrogen. he is able to freeze his opponents in blasts of liquid nitrogen. his wingswords channel his nitrogen powers into one huge blast. his mask is the mask of blindness. it allows the wearer to blind his opponents for a short amount of time.
Why does every Nitrogen toa have ice/frost powers? It makes no sense... Nitrogen is 80% of the air. They should have air powers. And don't worry about you getting it wrong - Shadowgear's done it too. He doesn't really care about it, but I dunno. I guess I'm picky. That aside, The MOC itself seems to be just a recolour of Matau with a different mask. =/ It certainly has room for improvement.