Wand of Magic Detection

This wand has 3 charges. While holding it, you
can expend 1 charge as an action to detect magic
around you. The wand regains 1d4-1 expended
charges daily at dawn. For 30 minutes you 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, if any. The
spell can penetrate most barriers, but is blocked
by 1 foot of stone, 1 inch of common metal, a
thin she