Elemental Barrage

Feats

You've mastered the art of raining elemental spells on your foes, and found a way to empower them by combining different elements. Benefit: Every time a spell you cast deals energy damage to a creature, you apply an elemental mark to it. If you deal energy damage to a marked target with a different type of energy during the next 3 rounds, the target takes additional divine damage equal to 1d6 per mythic rank.