Alarm

Level: Brd 1, Rgr 1, Sor/Wiz 1
School: Abjuration
Components: V, S
Casting Time: 1 standard action
Range: Close
Area: 20-ft radius emanation centered on a point in space
Duration: 2 hours/level (D)
Saving Throw: None
Spell Resistance: No
Metamagic: Extend, Quicken, Silent, Still

Alarm sounds a mental alarm each time a creature of Tiny or larger size enters the warded area or touches it.

A mental alarm alerts you (and only you) so long as you remain within the same area as the alarm. You note a single mental “ping” that awakens you from normal sleep but does not otherwise disturb concentration. A silence spell has no effect on a mental alarm. If you leave the area, the spell ends.