Yeah. It's a cave spider dressed in a diamond block.
Note: Minify the command to avoid issues :)
CAVE SPIDER WEARING DIAMOND BLOCK!!!!!
SICKNESS POTION (4 TROLLING)
Herobrine Comes In
Special Villiger
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)