Library / Magic
Alarm
You set an alarm against intrusion.
Description
You set an alarm against intrusion. Choose a door, a window, or an area within range that is no larger than a 20-foot Cube. Until the spell ends, an alarm alerts you whenever a 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 audible or mental:
Source: System Reference Document 5.2.1
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