Amulet of Protection +2

Sold by Nazramu, a djinn you "pulled" into your world using Spectacles of Spectacle during Zaviak's Vision Quest.

In-game description
"This amulet improves the wearer's Armor Class and Saving Throws versus all forms of attack. The magical properties of the amulet prevent it from being worn with other magical items of protection, including enchanted armor."