Ethereal Alarm

Ghostwalk (Gh)Updated Supplementals (3.0)

Ethereal Alarm is a D&D 3.5 spell (Abjuration) from Gh. On class lists for Bard (Level 2), Ranger (Level 2), Sorcerer (Level 2), and others. Range or area: Close (25 ft. + 5 ft./2 levels); Saving throw: None; Duration: 2 hours/level (D); Casting time: 1 standard action.

School
Abjuration
Casting Time
1 standard action
Components
V, S, F
Range
Close (25 ft. + 5 ft./2 levels)
Area
20 ft. radius emanation centered on a point in space
Duration
2 hours/level (D)
Saving Throw
None
Spell Resistance
No

As alarm, but detecting only ethereal creatures that enter the warded area.
The spell does not give you the ability to see the ethereal creatures once the alarm is triggered.