This is a command i made for a zombie boss ^-^
Its quite hard i think ;3
Note: Minify the command to avoid issues :)
Become a Mob!
OP Knock back Stick
Mega Zombie Boss
Ride able Spider!
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)