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 be a descendant of King Grayskull (a powerful barbarian and a hero from Eternia's ancient past), who sacrificed his life in order to save Eternia from the Evil Horde and originally wielded the Sword of Power. He was the original owner of Castle Grayskull; his sword was concealed in the castle for centuries before being given to Prince Adam, who inherited his ancestor's own power channeled through the sword (thus giving added meaning to the phrase "By the power of Grayskull..."). This action-figure line combined elements from the He-Man universe into a cohesive storyline with biographies on the figures' packaging.