Ride a horse while being covered by an ender dragon:
Note: Minify the command to avoid issues :)
MAKE AN EMERALD SIT ON A FURNACE!!!
HALF BEDS!!!
CONCEALING HORSE
MEDICINE DEALER
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)