Talk:Harpy Wings/@comment-26948970-20150901124833/@comment-25533325-20151011050001

You have to throw a Guide Voodoo Doll into a pool of lava deep enough to destroy items; Guide Voodoo Dolls can be farmed from a Voodoo Demon. Doing so will summon the Wall of Flesh and the battle will commence, stretching through the entirety of the Underworld. Attempting to flee will make your character explode and thus die... So, you should be prepared for the battle. I recommend building a flat bridge starting at one end of the Underworld to the other, at least quarter way through. WoF doesn't move incredibly fast, so defeating it shouldn't be too much of an issue if you have taken the right precautions. Have the Tungsten Armor set at least; if you don't have tungsten in your world, create another. A shooting weapon is advised, as melee is not very effective. Something like the Minishark, or a bow with Unholy Arrows, as they pierce. Throwing Knives are good, as well.

Hope this helps! Feel free to check the rest of the wiki, as there are some really helpful guides and strategies.