"Gwildor's Gamble!" from issue seventeen of the UK Masters of the Universe Adventure magazine is interesting in that it takes a movie character in Gwildor, and places him firmly in the comic continuity, which some would say is prior to the movie. This story revolves around the power of the Cosmic Key, and dare I say, would have made for a really good minicomic story to accompany the Gwildor action figure! The numerous panels in which we see He-Man, Teela, and Gwildor travelling through time are wonderfully illustrated!
(click on the image to see it at full-size)