Very Hard. Try it out.
Achtung: Minifiziere den Command um Probleme zu vermeiden :)
Link Set
Mystery Mob Boss Fight!
Speed Potion Troll!!
Emerald Armor!!!!! Check It Out!
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)