Wildfire
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.
Traits
An action with this trait requires a degree of mental concentration and discipline.
Effects with the fire trait deal fire damage, or either conjure or manipulate fire. Those that manipulate fire have no effect in an area without fire. Creatures with this trait consist primarily of fire or have a connection to magical fire.
Focus spells are a special type of spell attained directly from a branch of study, from a deity, or from another specific source. You can learn focus spells only through special class features or feats, rather than choosing them from a spell list. Furthermore, you cast focus spells using a special pool of Focus Points—you can't prepare a focus spell in a spell slot or use your spell slots to cast focus spells; similarly, you can't spend your Focus Points to cast spells that aren't focus spells.
You must physically manipulate an item or make gestures to use an action with this trait. Creatures without a suitable appendage can't perform actions with this trait. Manipulate actions often trigger reactions.