A boss weaker then ED or WB.I'll edit this soon if it doesn't work.
Note: Minify the command to avoid issues :)
Space Walkers in one command!
A hacked sword
Quarry for 1.8.8
A cheat helmet
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)