Blow up your world!!!
Note: Minify the command to avoid issues :)
No Way! Only a block of dirt can do that ?!!!!!
Firefighter's Items in one command
MOTHER OF ALL THE MOBS!!!!!
Astro Zombie (1.9.1)
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)