This command setting Ender Dragon spawner on your coordinates
Note: Minify the command to avoid issues :)
(/setblock) Ender Dragon mob spawner
Give me chest with 64 netherite blocks
Give me the best Sword
Give me Elytra (21w11a)
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)