Range: Special (30-foot radius)
Until the spell ends, you automatically sense the presence of magic within range, and you can use an action to study the aura of a magic effect to learn its schools of magic (if any).
The spell penetrates most barriers but is blocked by 3 feet of wood or dirt, 1 foot of stone, 1 inch of common metal, or a thin sheet of lead.
When using a spell slot of 2nd-level or higher, the spell no longer requires your. When using a spell slot of 3rd-level or higher, the duration increases to 1 hour. When using a spell slot of 4th-level or higher, the duration increases to 8 hours.