Helm of Death’s Pro- claimer

Wondrous item, rare (requires attunement)

This great horned helm of black metal and horn is crafted to resemble a monstrous face whose jaws encircle the wearer’s face. While attuned to this helm, you know which creature within 60 feet has the least amount of hit points and gain advantage on attack rolls against that creature. If you reduce a creature that is at least CR 1 to 0 hit points, you gain 1d8 hit points.