A wither skeleton with the head of a enderman.
Note: Minify the command to avoid issues :)
Shield 4 Minecraft
Green Leather Chestplate
Unlucky Potion (NO LUCKY BLOCK NEEDED =])
LUCKY WORLD!!!!!
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)