Alarm

Make a spell card:
NameAlarm
SchoolAbjuration
LevelArc 1, Brd 1, HB 1, Rgr 1, Sor/Wiz 1, Wealth 1
ComponentsV, S, F/DF
Casting Time1 standard action
Recharge Time4 hours
RangeClose (25 ft. + 5 ft./2 levels)
Area20-ft.-radius emanation centered on a point in space
Duration2 hours/level (D)
Saving ThrowNone
Spell ResistanceNo