A wither skeleton with the head of a enderman.
Note: Minify the command to avoid issues :)
OMG THIS IS AWESOME
Survival super kit
Lucky Potion (NO LUCKY BLOCK NEEDED =])
Herobrine Comes In
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)