This is funny looking...
Note: Minify the command to avoid issues :)
Better end: only one command! 1.12.2
Robo World Only One Command!!!
Herobrine boss!!!
Mega Nuke (By Sarp60)
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)