uncommon attack evocation sorcerer 

Bloodline elemental

Cast [>] somatic

Range 30 feet; Targets 1 creature

With a flick of your wrist, you fling a chunk of your elemental matter at your foe. Make a spell attack roll, dealing 1d8 bludgeoning damage (or fire damage if your element is fire) on a success, and double damage on a critical success. This spell has your element's trait.

Heightened (+1) The damage increases by 1d8.

Core Rulebook, page 404.