Amulet of Spell Warding

Amulet of Spell Warding provides the wearer of the amulet a +2 saving throw bonus vs. spells. It has a weight of 3 lbs. This item appears in Baldur's Gate II: Shadows of Amn, but it's not known where this amulet can be obtained.

In-game description
"A favorite item of protection for a mage entering a magical duel, this amulet provides protection against spells, but does not interfere with the mage's own spellcasting."