The Power of Grayskull has always been at the center of Masters of the Universe.
Emiliano's recent thread on original info vs the Classics bios got me thinking...
Over the years, there have been many different versions of MOTU's most famous castle and the source of its power.
Early Mini-comics: Castle Grayskull is full of ancient and mysterious technology. One must control both halves of the PowerSword to gain entry.
Filmation: Grayskull draws its immense power from the Abyss.
Movie: The Great Eye of the Universe unleashes the ultimate power when Eternia's moon reaches its zenith.
MYP: King Grayskull is the source of the power.
Classics: King Grayskull / He-Ro / Overlords of Trolla /The Sword of He
Which do you prefer?