They do a lot of damage! They are also fast!
Note: Minify the command to avoid issues :)
Universal Rift
Crazy Negative Potion!
SUMMON SKELETONS!
Make armor stands with ARMS! (READ DESCRIPTION!)
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)