This command summons a giant end/nether flying stack of mobs:
Note: Minify the command to avoid issues :)
DOUBLE GOD SWORD
SIT AND WATCH A HOUSE (START TO) BE BUILT =)
CONCEALING HORSE
SUPREME STICK CHEST
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)