I have no idea who this is but here is a mob of him
Achtung: Minifiziere den Command um Probleme zu vermeiden :)
OP Orb
A banner head
OP Diamond_chestplate
The spawning chest
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)