Surveillance

You set a magical surveillance at a location. Choose a small building, a large tower, or an area within range that is no larger than a 200-foot cube in which you are present for the duration of the casting. You place a ward over the area. The ward cannot extend into areas which you have not seen directly, including areas you have seen indirectly such as through divination magic.

Until the spell ends, you can concentrate on this spell for 1 minute to create an invisible sensor anywhere within the ward. You can continue to concentrate to see and hear through the sensor as if you were there and to use an action to change the position of the sensor to any place within the ward. The sensor cannot see or hear anything beyond 30 feet of the warded area. During this time, you are deaf and blind with regard to your own senses. A creature that can see invisible objects sees the sensor as a luminous orb about the size of your fist.

You are alerted whenever a Tiny or larger creature touches or enters the location. When you cast the spell, you can designate creatures that won't set off this alert. When alerted, you immediately awake if you are sleeping. You learn the exact point where the creature touched or entered the ward and you receive a mental image of the creature as if you could see them in that moment, granted any special senses you have. Upon receiving this alert, you can use your reaction to create a sensor within 10 feet of that point. You can then concentrate on the spell and manipulate the sensor as normal for as long as you concentrate.

At any point for the duration of the spell, you can produce the sound of a large bell for 1 minute which can be heard for up to 1 mile from the location. You can choose to make the bell stop early.

If you cast this spell again, any surveillance you created with this spell is instantly dispelled.