Detect scrying

Detect scrying is a divination spell that alerts one to magical eavesdropping.

Effect
You immediately become aware of any attempt to observe you by means of clairaudience/clairvoyance or scrying. The spell’s effect radiates from you moves as you move. The spell also reveals the use of crystal balls or other magic scrying devices. You know the location of every magical sensor within the spell's area.

If the scrying attempt originates within the area, you also know its location. If the attempt originates outside this range, you may get a visual image of the scrier and a sense of the scrier's direction and distance from you.

Realmslore
When Detect Scrying uncovers a spell a brilliant blue-white flash will burn in the area.

Material components
A small piece of mirror and a miniature brass hearing trumpet.