It is a Zombie riding a Wither Skeleton Skull.
Have Fun!
Note: Minify the command to avoid issues :)
Decent Beer
Drugdealer v1.0
Fireworks Present
Spell Tome of Heath I
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)
genessee
genessee
darkknight3227
galbby5
deadpoolbadhair