Ring of three wishes

Ring Magical Rare (this item requires attunement) [Three wishes. When you are hit by a melee or ranged attack while wearing this ring, you can use your reaction to wish that you hadn't been hit. The attack deals no damage. A charge is expended when a wish is used, one of the golden interlocking parts changes to stone. When all the charges are expended, it becomes a normal, nonmagical item.]

A ring made up of three golden interlocking parts.

Cost: 50gp per charge