Yeah. It's a cave spider dressed in a diamond block.
Note: Minify the command to avoid issues :)
Herobrine entered the world.
THE AWESOME POTION!!!
Unlucky Potion (NO LUCKY BLOCK NEEDED =])
AWESOME Trades Villager
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)