A very brave, bold, and somewhat surprising change occurred in the sixth episode of The New Adventures of He-Man. In the episode "Sword & Staff" writer Jack Olesker decided to introduce the latest toy incarnation of Skeletor, but he did so in an extremely clever way. When Skeletor locates a powerful crystal he is able to tap its energy and increase his own power, and suddenly for the first time we see Disks of Doom Skeletor! He would retain this look throughout the remainder of the series. My belief is that the move was made not to advertise the latest Skeletor toy, but because the design looked a lot more in keeping with the show's look than Skeletor's initial appearance.
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