I DID NOT MAKE THIS COMMAND IJAMINECARFT DID!
Tutorial (click here)
Note: Minify the command to avoid issues :)
BIG BERTHA! FROM ORESPAWN! NO MODS!
Item Duplicator
Make Minecraft Easyier Kit
Royal Guardian Sword
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)