Call Hellfire

You unleash a blast of hellish fire. Each creature in a 10-foot emanation around you takes (((the item's level ÷ 2, rounded down) − 1) × 2)d6 fire damage and 1d4 persistent spirit damage, with a basic basic Reflex save against the higher of your class DC or spell DC. This damage increases by 2d6 at 10th level and every 2 levels thereafter.