wazaa

For the duration, you sense the presence of living creatures within 30 feet of you. Creatures that are hidden, behind walls, or otherwise obscured appear as faint outlines that you can perceive. This 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. The spell lasts for up to 10 minutes with concentration.