Laser Beams!
Note: Minify the command to avoid issues :)
Diamond Man (1.9.1)
Magic heads in one command
More Mobs: Air Zombies 1.8.7 (Read The comments
BECOME GOD
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)