Easy it's just a Ghast Riding a GIANT
Note: Minify the command to avoid issues :)
Troll Potion (Troll ur m8s)
Cool Holographic Text (No more floating horses)
Annoying Villager Murderer
Notch Book Troll
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)