Whirling Flames
Focus 3UncommonCurseboundEvocationFireOracleSource Advanced Player's Guide pg. 234Mystery flamesCast 
somatic,
verbalRange 30 feet;
Area up to two 5-foot bursts that don't overlap
Saving Throw basic Reflex
You call forth a storm of whirling flames, engulfing all creatures in that area and dealing 5d6 fire damage with a basic Reflex save.
Heightened (+2) The damage increases by 3d6, and you can add another nonoverlapping 5-foot burst to the area.