After killing the Ender Dragon, Steve went back to the overworld through the portal, but what he did not realise is that travelling through the portal created a Shadow character of himself in the form of a Ender like creature.  This creature now stalks Steve improving itself for a time when it can finally seek revenge.

This is the base that I used for my skin that I wear with pride, but it can also function as a skin itself.  You can find my skin on this link: http://www.planetminecraft.com/skin/ender-mage-3427552/