Detect magic (Ritual)

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.