Unholy Arrow

Unholy Arrows are Arrows that have a piercing effect, allowing it to penetrate three monsters (Jester's Arrow have a similar effect). Against multi-section monsters, a single Unholy Arrow can damage multiple sections.

Unholy arrows are obtained through crafting worm teeth and wooden arrows, while using an Iron Anvil. They are also dropped by the Eye of Cthulhu and the Eater of Worlds, as well as rarely found in chests underground. As of 1.0.5, Unholy Arrows can now be purchased at night from the Arms Dealer for 40 copper each if you have defeated the Eater of Worlds.