This boss is very hard to kill.
Tips & Tricks
1.he has 250Hp and doesn't take knockback so you want to try and use potions of harming to kill him
2.if you don't have potions try using smite it could help
3.use fire and wither for extra dps
4.try digging a hole so he cant hit you
5.use strong armor.
6.if you have a flame infinity bow try using that.
7.build walls
8.light up the arena so no other enemies spawn that could kill a one life or hardcore run.
9.do not be stupid
10.do not under estimate him.
11.give yourself and ender glove get it here