This command summons a giant end/nether flying stack of mobs:
Note: Minify the command to avoid issues :)
SUPREME STICK CHEST
MAKE AN EMERALD SIT ON A FURNACE!!!
USELESSLY ENCHANTED SWORD
LOCKED CHEST CHEST
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)