Here is a very dramatic illustration from the Ladybird book "The Iron Master" by Robin Davies. I love the angle on this illustration in which we see the heroes atop Castle Grayskull looking down towards the Iron Master, as it chases He-Man and Battle Cat towards the jaw-bridge. There is a great deal going on in this illustration. First we have Teela firing a beam from her Kobra staff, striking the Iron Master; secondly we have the Iron Master's eyes creating shafts of harsh red light; and thirdly He-Man and Battle Cat racing into the castle.
(click on the image to see it at full-size)