Sunburst

Make a spell card:
NameSunburst
SchoolEvocation [Light]
LevelArc 8, Drd 8, Elf 8, Purification 8, Shu 8, Sor/Wiz 8, Summer 8, Sun 8, Wmg 8
ComponentsV, S, M/DF
Casting Time1 standard action
Recharge TimeGeneral
RangeLong (400 ft. + 40 ft./level)
Area80-ft.-radius burst
DurationInstantaneous
Saving ThrowReflex partial; see text
Spell ResistanceYes