The Dragon's Jewel
A Shield of Arrow-Catching that also transforms into an acorn.
As per the Shield of Arrow-Catching, grants +2 AC against any ranged weapons, and can also transform into a tiny acorn. The shield is a gift from the Golden Stag Princess, who was cursed for her vanity so long ago she no longer remembers her past or exact crime. She has taken the rather indifferent Dorn as her champion to protect her during her search for a way to lift the curse.
The other members of the Ring of Adventurous Men declined her gifts and declined to accept service with her.