Detect Magic

For the duration, you sense the presence of magic
within 30 feet of you. If you sense magic in
this way, you can use your action to see a
faint aura around any
visible creature or object in the
area that bears magic, and you learn its
school of magic, if any.
The spell can penetrate most barriers,
but is blocked by 1 foot of stone, 1 inch
of common metal, a thin sheet of
lead, or 3 feet of wood or dirt.