Detect Heat

For the duration, you know if there is an abnormal change in temperature within 30 feet of you, as well as where the change is located. The temperature does not need to be changed magically, If you sense a change in this way, you can use your action to see a faint aura around it

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.