attack cantrip evocation fire 

Traditions arcane, primal

Cast [>>] somatic, verbal

Range 30 feet; Targets 1 creature

A small ball of flame appears in the palm of your hand, and you lash out with it either in melee or at range. Make a spell attack roll against your target's AC. This is normally a ranged attack, but you can also make a melee attack against a creature in your unarmed reach. On a success, you deal 1d4 fire damage plus your spellcasting ability modifier. On a critical success, the target takes double damage and 1d4 persistent fire damage.

Heightened (+1) Increase the damage by 1d4 and the persistent damage on a critical hit by 1d4.

Core Rulebook, page 360.