Divine Sense

The presence of strong evil registers on your senses like a noxious odor, and powerful good rings like heavenly music in your ears. As an action, you can open your awareness to detect celestials, fiends, and undead within 60 feet of you that are not behind total cover, learning each creature's type (and whether it was summoned, for celestials/fiends). You can use this feature a number of times equal to 1 + your Charisma modifier, regaining all expended uses after a long rest.