Alarm

You set an alarm against unwanted intrusion. Choose a door, a window, or an area within range no larger than a 20-foot cube. Until the spell ends, an alarm alerts you whenever a Tiny or larger creature touches or enters the warded area. When you cast the spell, you can designate creatures that won't set off the alarm. You also choose whether the alarm is mental or audible. A mental alarm alerts you with a ping if you are within 1 mile. An audible alarm produces a hand bell sound for 10 seconds within 60 feet. In the Grey Age, setting an *Alarm* before camp is not paranoia. It is common sense.