uncommon attack cleric evocation fire 

Domain fire

Cast [>>] somatic, verbal

Range 60 feet; Targets 1 creature

A blazing band of fire arcs through the air. Make a spell attack roll. The ray deals 2d6 fire damage.

Critical Success The ray deals double damage and 1d4 persistent fire damage.Success The ray deals full damage.

Heightened (+1) The ray's initial damage increases by 2d6, and the persistent fire damage on a critical success increases by 1d4.

Core Rulebook, page 392.