Amulet of Warding

The Amulet of Warding is an item in Hexen that increases your character's armor class. Its appearance is that of a necklace with a leather strap and with a blue gem set in silver. The Fighter receives 1 point of armor, the Cleric receives 4, and the Mage receives 5.

Trivia
In this context, "warding" refers to guarding, repelling, or a defensive enchantment. It comes from the Old English "weardian", which means to guard.