Brightshore

A cold iron armband with long needles on the interior. It is worn by Shadar-kai to stave off effects of the Shadowfell and preserve their souls from corruption so they might be saved. Through a conduit of pain, the Shadar-kai find their focus.

Your maximum hit points are reduced by an amount equal to your level until this item is removed. You gain advantage on Wisdom saving throws, cannot be possessed, and cannot become undead. If you die while wearing this item, your soul is bound in place until it is removed.