Alarm

Abjuration (Ward)
Tier: 1
Components: Verbal, Somatic
Casting Time: 1 round
Ritual Casting Time: 10 minutes
Range: Touch, see text
Area: See text
Duration: 2 hours/level
Saving Throw: None

From behind you, you hear a terrible shriek. It seems your escape will not be so easy after all.

When you cast this spell, you ward an area or object. If you ward an object you need only touch the object while you cast the spell. If you ward an area, you must pace out the perimeter as you cast the spell. The warded perimeter may be as long as 150 ft + 10 ft per caster level.

Alarm sounds a mental or audible alarm each time a creature of Tiny or larger size enters the warded area or touches or opens (you decide if one or both of these trigger the alarm) the warded object. A creature that speaks the password (determined by you at the time of casting) does not set off the alarm. You decide at the time of casting whether the alarm will be mental or audible.

Mental Alarm
A mental alarm alerts you (and only you) so long as you remain within 1 mile of the warded area. You note a single mental “ping” that awakens you from normal sleep but does not otherwise disturb concentration.

Audible Alarm
A deafening clamor, and anyone within 120 feet of the warded area can hear it clearly. The sound lasts for 1 round.

Augmentation:
If you cast this as a tier 2 spell, the creature who triggers the alarm and all others within 10 ft must make a Spell save or be stunned for 1 round.