When an alarm spell is cast, the magic-user causes a selected area to react to the presence of any living creature larger than a normal rat, i.e. anything larger than about one-half cubic foot in volume or more than about 3 pounds in weight. The area of ef- fect can be a portal, a section of floor, stairs, etc. As soon as any living creature sets foot upon the area, touches it, or otherwise contacts it, the alarm spell will evoke a loud ringing which will be clearly heard within a 60' radius. (Reduce the radius by 10’ for interposing doors, by 20’ for substantial interposing walls.) The sound will last for 1 seg- ment and then cease. While undead creatures will not cause the spell to function, invisible creatures, as well as those from other planes who are otherwise alive, will do so. Ethereal or astrally projected creatures will not trigger an alarm, but flying and levitating creatures will. The material components of this spell are a tiny bell and a piece of very fine silver wire.