Keldor

Masters of the Universe
Publication information
First appearance	1982
Created by	Mattel
In-story information
Base(s)	Eternia

Masters of the Universe (commonly abbreviated MOTU and sometimes referred to as He-Man, after the lead hero) is a media franchise created by Mattel. The main premise revolves around the conflict between the heroic He-Man, real name Prince Adam, and the evil Skeletor on the planet Eternia, with a vast line-up of supporting characters in a hybrid setting of medieval sword and sorcery and sci-fi technology. Later spin-offs, especially She-Ra, Princess Of Power, also featured He-Man's sister She-Ra and her struggle against the Evil Horde, along with other planets/settings; however the main premise usually remained the same. Since its initial launch, the franchise has spawned a variety of products, including six lines of action figures, four animated television series, several comic series, a daily newspaper comic strip, and a feature film.

In 1976, Mattel's CEO Ray Wagner declined a request to produce a toyline of action figures based on the characters from the George Lucas film Star Wars. Upon the commercial success of the film trilogy during the next few years and all related merchandise, Mattel attempted to launch several unsuccessful toylines, none of which captured the public's imagination or made a significant dent in the toy market.

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Wikipedia