I don't have the 1.9 snapshot so I can't test the loots table.
Note: Minify the command to avoid issues :)
Ender Skeleton (1.9)
New Ore Drop One Command
Copper Ingots
Electric Stuff
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)