I used MrGarretto's command combiner, so this is not entirely mine.
Note: Minify the command to avoid issues :)
Phone in Minecraft!
Spidey sense, Bane strength and space mechanics in one command block!
Mark 1: Iron Man's Helmet in Vanilla Minecraft
LOL LOL LOL
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)