https://minecraftcommand.science/profile/vimsehode
This is my friend as a boss, check him out please.
An overpowered boss you'll need powerful stuff to beat him, but you get great stuff in return.
Oh, and don't get hit once without SUPER OP ARMOUR THROUGH COMMANDS OR YOU DIE I MEAN THE PROTECTION LEVEL HAS TO BE OVER 9000!!! (well its not that powerful but it still is very powerful)