it is the person who won the minecon 2103 skin contest
Note: Minify the command to avoid issues :)
PICK UP THE BRICKS
Shoot The Ender Crystal
MooshroomJockey
A Weird Animal
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)