Mojang decided that no gravity mobs can't move on their own, so gg.
Note: Minify the command to avoid issues :)
XP spawner
Summon a slutty zombie
Flying witch
Giant/Ghast combo boss
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)
boxpersonx8
boxpersonx8
darkknight3227
galbby5
deadpoolbadhair