Unexpected Butcher-77 Add-on 1.17+

The Unexpected Butcher-77 mod adds an extremely dangerous boss capable of destroying the player in just one hit. You will be able to spawn the boss even in survival mode and fight him. The mob has four phases of battle, and then something strange happens that we can't explain to you. You'll have to check it out.

The first phase of the butcher.
Uses a shield to block attacks.
Vulnerable when tired.
Uses an unreliable stone.


Second phase butcher
Ranged and ranged attack
Uses a multi stone


Third Butcher Phase
Ranged attack
Uses elemental stone


Fourth Butcher Phase
Charge with a running start and sword whirl
Can fly
Throws his head when he dies


Fourth Head Phase
3 small phases
Uses a lightstone


Unknown Core
Unknown


How do I summon a mob?
You need to create an altar with a book of instructions


Unreliable stone


Multistone


Elemental Stone


Illuminated Stone


Stone Talisman.
You will need to understand what this item does