Detect Secret Doors

Make a spell card:
NameDetect Secret Doors
SchoolDivination
LevelBeguiler 1, Brd 1, Cavern 1, Hoard 1, Knowledge 1, Sor/Wiz 1
ComponentsV, S
Casting Time1 standard action
Recharge TimeGeneral
Range60 ft.
AreaCone-shaped emanation
DurationConcentration, up to 1 min./level (D)
Saving ThrowNone
Spell ResistanceNo