I used MrGarretto's command combiner, so this is not entirely mine.
Note: Minify the command to avoid issues :)
Smoke/Gas Bombs!
Scarecrow's Fear Gas in MC!
My 1 command creation!
Gamma Radiation Bomb
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)