Wondrous Item, rare
When worn, this item provides it's wearer with increased insight into enemies in their line of sight. The wearer can ascertain the immunities/resistances of the target, their class and race , as well as the target's proficiency in saving throws. The wearer gains advantage on any saving throws against the target or the targets attacks, and Wisdom (Insight) checks against that target.This does not work if the wearer is unconscious, or on another plane of existence.
Notes: Advantage: Insight