Detect Life

 For the duration, you sense the presence of Living creatures within 60 feet of you. If you sense Life in this way, you see a bright red aura around the Heart of any living visible creature in the area. If the creature is out of your line of sight or through a barrier that can be penetrated by the spell you can discern it's general direction but not the exact location. The spell does not show or have any effect on Undead or Constructs. The creature must also be of a type that has a heart and blood. 

The spell can penetrate most barriers, but it is blocked by 10 foot of stone, 5 feet of normal metal, a thin sheet of lead, or 10 feet of wood or earth. 

 At Higher Levels: the distance and duration of the spell increases by 20ft and 1 min for each spell slot 3rd level or higher.