Fight the Headless Horseman in Minecraft.
Note: Minify the command to avoid issues :)
Fight the Headless Horseman in 1.11
Burning Meteor of Hellfire
Go Really Fast with a Walking Stick
Hellfire Orb
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)