Wither!
Note: Minify the command to avoid issues :)
HOW TO MAKE YOUR PLANTS GROW IN 3 SECONDS (2 SECONDS)
Johnny the defender (1.8)
More mobs in 2 command (Second one below}
More TNT (Not exploding :( )
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)