While crafting the story for my character Angie, I had to come up with a race of creatures that would have taken over the world she finds herself in. It was important that these creatures would have a very imposing silhouette. I ended up designing 9ft tall bird creatures that have lost the ability to fly after having been exiled underground after a war hundreds of years ago, but as such are very fast and very strong.
So Zephon is the general of the army of these bird warriors and is intended to be the primary antagonist of Angie's story. He's basically an unstoppable force and while surely not as powerful as Sauron from Lord of the Rings, I definitely felt he would be this fantasy world's equivalent.