How do I kill the Wall of Flesh? [duplicate]

You say that "every time he spawns backwards." Wherever you spawn it, the Wall of Flesh always travels toward the middle of the world. So if you spawn it close to one end of the Underworld, you can be assured that it will go the right way: away from the edge of the world, giving you lots of space. Other than that, just bring a good piercing weapon (Minishark with Meteor Shot and Water Bolt are both great choices); a rapid-fire weapon is fine because the Wall has very low defense.

The best way to fight the Wall of Flesh is to prepare first.

• Build a LONG platform from blocks you have in excess (I used the candy cane blocks).

• Break a hole in the middle of the platform, then throw the doll in.

• Try throwing the doll in the lava with your back facing the side you want the boss to spawn on if the Wall spawns backwards.

Sidenote: Your weapons are good, as well as your armor. Just stay far enough away from him, and you'll be fine.

Don't get too far away though, or you'll die instantly from a debuff he gives you called "Horrified".