Darius is the leader of the Galactic Council. It was his memory of ancient legend that prompted Icarius (Flipshot) and himself to travel back through time to Eternia to find He-man. His energy mace is a powerful weapon which can strike terror into the hears of Skeletor's goons.
Darius appeared in the 1989 Mattel retailers catalogs in Europe and he was a central figure in He-Man's new series storyline, which was significantly different from the story presented in the US.
This figure was not mass-produced but prototypes do exist of him.
Recently a test shot surfaced and was auctioned on eBay, indicating that steel molds had been created for the figure. According to the seller, Darius was not mass-produced due to complications with his actionfeature, which didn't work correctly on the finalized figure.