Wither!
Note: Minify the command to avoid issues :)
Blaze Master Boss Battle
Notch has added a new mob to minecraft:Tiger
ALMOST BEST WOLF EVER (Must Tame it !)
HOW TO THROW FIREBALLS
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)