Here is one of my favorite illustrations from the Masters of the Universe Ladybird book "A Trap For He-Man". Skeletor's stance with his Power Blade held high makes him look incredibly formidable, as Teela appears to be resigned to the fact that she is Skeletor's prisoner. The Shadow-Man, who appear in force in this story, is also given an appropriately cool low pose. There is an impressive use of blacks in this illustration, and throughout the book, too!
(click on the image to see it at full-size)