Nazar

The Nazar is a post-Skeletron accessory that grants immunity to the Cursed debuff. It has a /  chance to drop from Cursed Skulls,  Giant Cursed Skulls, Cursed Hammers, Enchanted Swords, or Crimson Axes.

It is one of the ingredients of the Countercurse Mantra, which is a crafting material required to make the Ankh Charm, an accessory which can be further crafted into the Ankh Shield.

Trivia

 * It is one of the four components of the Ankh Shield that can be obtained in Pre-Hardmode, the others being the Obsidian Skull, Cobalt Shield, and Bezoar. However, Shimmer allows one to obtain the Megaphone before Hardmode if they have obtained the Nazar.
 * A is an eye-shaped charm commonly found in the Middle East meant to ward away a superstitious curse called the, believed to be cast by a malevolent, envious, or admiring gaze (depending on the culture), causing misfortune or injury (usually unintentionally) to the afflicted. The word  is derived from the Arabic  meaning sight or seeing; in this case it means glare.