Cassiel's Cartomancy

You imbue two cards of the same arcana or suit with divination magic, allowing you the ability to use the cards as a limited crystal ball. When cast, choose either sound or sight. For the duration, you can see or hear through one of the cards while leaving the other one in a location or with a person. If choosing sight, choose one side of the card to act as the “face.” The point of view of the face determines what you see. i.e, if the card is face down you can only see the floor. If choosing sound, choose one of the sides to act as a face. If the card does not directly face the source of sound, the person attempting to listen in must succeed a DC 10 Wisdom (Perception) check or does not hear anything. The spell lasts for the duration until either card is 200 feet away from the other, or it is dismissed as an action. When the spell ends, the cards burst in blue flame leaving nothing behind.