Has ender particles coming out of its head (and is upside down).
Note: Minify the command to avoid issues :)
Wither That Shoots Itself and Can't Fly
Creeper King Boss
Lagster McGagster the lag machine
Smiley Sun Banner
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)