Dream Sight

For the duration, you sense the presence of dream marks within 30 feet of you. If you sense marks in this way, you can use your action to see a faint aura around any visible creature or object in the area that bears the mark, and you learn its effect if any.

You also have advantage on saves and checks against illusion spells and effects during the duration. Dream marks cannot be detected via Detect Magic.

The spell can penetrate most barriers, but it is blocked by 1 foot of stone, 1 inch of common metal, a thin sheet of lead, or 3 feet of wood or dirt.