For the duration, you can detect the alignment of creatures and sentient items. When you cast the spell and as your action on each turn until the spell ends, you can creatures or items that you can see within 30 feet of you.
You can also use this spell to detect the presence of creatures you can’t see. When you cast the spell or as your action during the duration, you can search for alignments within 30 feet of you. The spell can penetrate barriers, but 2 feet of rock, 2 inches of any metal other than lead, or a thin sheet of lead blocks you. You can’t detect a creature or sentient item that has no alignment.
Once you detect the presence of a creature in this way, you determine it's location, even if you can’t see it, but it must still be within range.
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