Mojang decided that no gravity mobs can't move on their own, so gg.
Achtung: Minifiziere den Command um Probleme zu vermeiden :)
Flying witch
Giant/Ghast combo boss
XP spawner
CHEF B O Y A R D E E
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)