Spawn in Agathia the Friendly Creeper.
Note: Minify the command to avoid issues :)
Saturation Potion
Bunny with a Hat
Agatha the friendly Creeper from Stampylongnose
Get Giant Slimes
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)