Piglin Mage

It will attack you with a magical stick that could make 3 types of attacking 

1°¬ Melee: It would chase you and if it hit you would lose 18 HP and freeze you for 1.5 seconds, but it will have slowness 1 while its using this attack

2°¬ Fireballs: It would shoot fireballs that would chase you and quit you 10 HP while the Boss is flying

3°¬Volcano: This attack would only be used when the Boss is in 10 HP and will sumonn a volcano behind him that would  shoot blue lava balls to you they would kill you at half the time than normal lava.

This boss would drop it stick and 40 xp levels. It would be would be the size of the player and have 70 HP.

It will spawn naturaly in a new tower at the center of a piglin bastion.

If you want to do another thing with the stick you could use it to craft with a wither skull a loyalty stick that would make the piglin loyal to you while you are holding it (if someone attacks you they will attack the enemy, you could open chests near them, they will follow you to protect you and they will not be angry if you punch them.

Thanks for reading this idea I hope it will be implemented to the game