The two minions of the great king of all elements, elemental. They were given powers based on their personalities. Snowstorm gained control over cold; water and ice. Heatwave gained control over heat and fire.
About this creation
Originally the glatorian Strakk, Snowstorm was given abilities over water and ice. After his defeat at the hands of Mata nui, he was approached by Elemental, who would help him get revenge, but only if he became his eternal servant. He now uses these powers to fight his masters enemies
A dark hunter, Heatwave lost his powers after trying to kill The Shadowed one. He was approached by Elemental after becoming a Glatorian to escape the Dark hunters hunting him. Elemental offered to redeem his abilities, but only if Heatwave gave his eternal loyalty in return for the powers. He agreed and now uses the new abilities to hunt down and destroy the enemies of master Elemental.
They're a combiner
After both of them were nearly killed by the great spirit Mata nui, the were given a new form; Freezeflame, the master of heat and cold. The ultimate being, besides it's master, it will hunt down and destroy any being who even tries to touch their master without authorization from Elemental himself.
Rate and comment, or ill make you feel so cold it will burn. (just kidding :)