Sy-Klone is the last guardian of the Legacy Stones which were housed in a citadel on the island of Anwat Gar. It is unknown how long he had served as the protector of the Stones.

Sy-Klone is one of the most powerful of the Masters of the Universe, his air elemental-like powers rivaling the strength of other heroes such as He-Man, Zodak and Moss Man. 

Sy-klone has developed a friendship with Roboto.