Surveillance

You weave a lattice of intercepting magic that fills a 1-mile-radius sphere centered on a point you choose within range. While this spell persists, any time a message from a message spell or a sending spell originates within the sphere or would travel through it, you also hear the message, as if the sender had sent it to both you and their intended recipient. You learn neither the identity of the sender nor the intended recipient when you intercept a message in this way, unless you already know them.

When a message triggers the spell as described above, you can choose to prevent the intended recipient from receiving the message, so that only you receive it. If you do so, the sender must make an Intelligence saving throw. On a failed save, both the sender and the intended recipient are aware that their communication was magically interfered with, though they don't learn by whom. The spell ends if it intercepts five messages, you dismiss it as a bonus action, or it is dispelled.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the spell can intercept a number of messages equal to the level of the spell slot you used before it ends.