His true identity was Prince Adam of Eternia, son of King Randor and Queen Marlena (an earthling), who ruled the Kingdom of Eternia on the planet of the same name. The Sorceress of Castle Grayskull endowed Prince Adam with the power to transform into He-Man, which Adam did by raising his Power Sword and proclaiming, "By the power of Grayskull..." Once the transformation was complete, he continued "...I have the power!".He also is able to return to his former form by saying, "Let the power return." This is seen in the episode 110, "The Problem With Power". The differences from Prince Adam and He-Man were minimal; He-Man had a slightly deeper voice, a different wardrobe (soldier armor and boots), and slightly darker skin and hair.