In this panel from Robert Lamb's storyboards for the season two He-Man episode "Fisto's Forest", we see that his original plan was to have the role of the Grazzler played by an Ice Hacker. Robert had previously used the Ice Hacker in his storyboards for "The Dragon's Gift", to it would only make sense to reuse the character design. However, Filmation decided to go with a different design, one unique to the episode. Although the design would later show up in "Battle For Bright Moon".
(click on the image to see it at full-size)