Challenge yourself by fighting someone worthy of your fighting.
Note: Minify the command to avoid issues :)
Dungeon Beast
Pat's Head-Jen's Wacky Guesses Mod
Glitch Sword Epic
Orespawn Command Set
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)