Detect Magic

Action, Self V, S
Concentrate, up to 10 minutes, and you can
sense the presence of magic within 30ft 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.
It's blocked by 1ft of stone, 1" of common metal,
a thin sheet of lead, or 3ft of wood or dirt.