He-Man art and mini-comics for distribution with the action figures. According to Roger Sweet: In the illustrated books released with the first series of toys, He-Man was a barbarian from an Eternian tribe. The planet's inhabitants were dealing with the aftermath of the Great Wars, which devastated the civilizations which once ruled supreme. The wars left behind advanced machinery and weaponry, known only to select people. An early incarnation of the Sorceress of Castle Grayskull gave He-Man some of these weapons, and he set out to defend the secrets of Castle Grayskull from the evil Skeletor. He-Man possessed one-half of the
He-Man grew up together and now, as Captain of the Guard, she was entrusted to protect the prince. Unaware of his alternate identity as He-Man, she saw Adam as lazy and cowardly. Man-At-Arms was He-Man's closest companion and the Eternian royal family's innovator of technology and weapons. In many episodes, Man-At-Arms unveiled new and fantastic weapons or devices which helped He-Man and his friends. Castle Grayskull was the source of He-Man's powers. Inside the Castle lived the Sorceress, who granted Prince Adam his transformative abilities and communicated telepathically with He-Man. To protect his family He-Man kept his double identity a secret,