Spawner
Note: Minify the command to avoid issues :)
KING ZOMBIE (HARD!!)
Lucky Chestplate yup
Real Lucky Potion
GIANT TNT NO MODS!!!! (that explode the world with lag actually)
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)