The presence of strong evil registers on your senses like a noxious odor, and powerful good rings like heavenly music in your ears. Once a day, you can attempt to open your awareness to detect such forces in a square of 4 × 4 foundations centered on the Paladin. Any Celestial, Fiend, or Undead within range must roll a Wisdom saving throw against your Charisma roll. Should they fail, you will know the type of being that they are within the square but not their identity.