Detect Life

For the duration, you sense the presence of sentient life within 60 feet of you. If you sense life in this way, you can use your action to see a faint aura around any visible or invisible living creature or object in the area that bares sentience, and you learn its basic creature type. If the creature is considered a Fey, Fiend or Undead they cannot be detected in this way.

The spell can penetrate most barriers, but it is blocked by 1 foot of stone, 1 inch of common metal, a thin sheet of lead, or 3 feet of wood or dirt.