A Giant Wearing Magma Armor. Pretty Easy.   Difficulty:2.3/5
Note: Minify the command to avoid issues :)
New Mob: Dragon Brawler!!! (Spawner)
Wither Storm Troop (My First Command) Has Custom Drops
Magma Giant (Easy)
New Mob: Sugar Rush!!!
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)