This has no bug.
Note: Minify the command to avoid issues :)
Herobrine Shovel or Spade
Alcoholic Smith
Bence6's Super Enchanted Diamond Axe
Bence6's Super Enchanted Diamond Chestplate
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)