Most Destructive mob spawner in the world!
Note: Minify the command to avoid issues :)
Troll Sword(POWERFUL!)
Flash's Boots(Super Fast!)
? Potion
U MAD BRO? 2.0
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)