Wildfire
level_1 druid conjuration ==Uncommon Conjuration Druid Fire== Source Secrets of Magic pg. 201 1.1 Cast ►► somatic, verbal Range 30 feet; Area 10-foot burst Saving Throw Reflex; Duration sustained up to 1 minute
A thin layer of ash and flame covers the ground in the area. The area becomes hazardous terrain. A creature that moves on the ground through the area takes 1 fire damage for every square of that area it moves into. A creature that ends its turn in the area must succeed at a Reflex save or take 1 persistent fire damage.
Each time you sustain this spell, the radius of the burst increases by 5 feet.
Heightened (+2) Increase the damage and Persistent Damage by 1.