3 words: Flying Ender Crystal.
Note: Minify the command to avoid issues :)
Disguised Boots
Spidey sense, Bane strength and space mechanics in one command block!
Batman Geared Leggings
INVINCIBILITY SWORD
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)