The OP Boss for 1.8.X
Note: Minify the command to avoid issues :)
RocketJump | One CommandBlock
2x Healt By FlashBatMan
Magic Book By FlashBatMan
The Skeleton Boss [1.8]
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)