Detect Metals

For the duration, you sense the presence of metal within 30 feet of you. If you sense metal in this way, you can use your action to hear a faint beeping noise around any metal object or material in the area, and know what type of metal is present.

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.