Masters of the Universe: He-Man & She-Ra

In this successful all-time classic series, He-man the action-adventure hero must use his superhuman power to overcome the forces of evil. 

It all begins when The Sorceress, who dwells in the mysterious and magical Castle Grayskull calls on Adam, Prince of Eternia.  She presents Adam with a powerful and magical sword, which he must learn to use with great wisdom and knowledge. The sword enables Adam to transform himself into He-man, the most powerful man in the Universe, by holding aloft his magic sword and commanding "By the power of Grayskull! I have the power!" The sword also transforms his trusted but fearful feline friend Cringer, into the fierce and loyal sidekick, Battlecat.