Blacklight

Make a spell card:
NameBlacklight
SchoolEvocation [Darkness]
LevelDarkness 3, Sor/Wiz 3
ComponentsV, S, M
Casting Time1 standard action
Recharge TimeGeneral
RangeClose (25 ft. + 5 ft./2 levels)
AreaA 20-ft.-radius emanation centered on a creature, object or point in space.
Duration1 round/level (D)
Saving ThrowWill negates or none (object)
Spell ResistanceYes or no (object)