This fantastic illustration by Robin Davies from the Ladybird book "Skeletor's Ice Attack!" was used as a promotional illustration when Ladybird would advertise their books in magazines. And rightly so! I remember being at school when one kid, who had just managed to acquire this book, came racing over to us. We all stood in the hall, instead of going into class, looking wide-eyed at this awesome piece of artwork! The definition of He-Man's physique looks impressive, but the power of Castle Grayskull that surrounds him steals the show!
(click on the image to see it at full-size)