He-Man and the Masters of the Universe The Curse of the Spellstone (1983–1985) Online
Skeletor and Evil-Lyn steals from The Temple of the Fire People, the Spellstone, a magic orb and uses it to create fierce storms and causes havoc on Eternia. Evil-Lyn disguises herself as a villager and tricks the villagers into giving her the Creeping Horak, a ancient device used to punish criminals, and uses it to trap King Randor, Queen Marlena, Man-At-Arms, Teela and Orco in the Royal Palace. But after being trapped underground He-Man, Ram-Man and Stratos escapes and find themselves fighting The Fire People who believe He-Man and his companions stole The Spellstone. Can He-Man retrieve the Spellstone from Skeletor and save his friends from the Creeping Horak? and will He-Man return the Spellstone to The Fire People?
| Episode cast overview: | |||
 | John Erwin | - | He-Man / Prince Adam / Ram Man / King Helios (voice) |
 | Alan Oppenheimer | - | Skeletor / Man-At-Arms / Cringer / Battle Cat (voice) |
 | Linda Gary | - | Teela / Evil-Lyn / Queen Marlena (voice) |
| Lou Scheimer | - | Orko / Stratos / Trap Jaw / King Randor / Jaymar / Old Zak (voice) (as Erik Gunden) |
The tentacled monster that attacks the Heroic Warrors twice in the Region of Fire was referred to only as 'Serpent' in the script, but reappeared in He-Man and the Masters of the Universe: Double Edged Sword (1983), where it was called a Spidasaur.
The old woman disguise used by Evil-Lyn will also be used by the evil wizard Jarvan in He-Man and the Masters of the Universe: A Friend in Need (1983) and then again by Evil-Lyn in He-Man and the Masters of the Universe: The Royal Cousin (1983).
The shot of Man-At-Arms repairing the Sky Sled during the moral is seen again in He-Man and the Masters of the Universe: A Beastly Sideshow (1983). A version with Adam replacing Man-At-Arms was used in He-Man and the Masters of the Universe: Teela's Quest (1983).
The animated sequence of Cringer's fur standing on end with fright will be seen again in He-Man and the Masters of the Universe: Fraidy Cat (1984).
Near the end, Trap Jaw is shown with his Saw Blade attachment for the only time in the series.
In this episode, the protagonists face a monster called "The Creeping Horak". In the spin-off series "She-Ra: Princess of Power", the main villain's name was Hordak.