Dr Trayaurus from DanTDM!
Note: Minify the command to avoid issues :)
Pogo Stick!
Summon Dr Trayaurus!!!!!!!!!
A Zombie Pigman Sword!
A Really OP Sword!!!!!!!!!!!
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)