He once once a matoran farmer who was one of the victims of the karzahni tornado , but instead of dying , he became a toa . Landing in the shores of Metru nui , he made a new toa team , The Toa Antra . Until one of the members betrayed them and killed them all ,except for Mercurex . He went back to Arkanui for safety . Now he is the toa of air for the New Arkada.Until he met with a toa of Iron named Dankorr ( who was part of the New Arkada for a short time ) who willingly gave his powers of iron to him .Risking his life Dankkor died inthe process. Now Mercurex is a toa of Air and Iron.
Wings in the Back .
His Mask of Clairvoyance , that allows Mercurex to see into the near future. While the user can foresee the future, they cannot do anything to change it