As two actions, you create a two tiny meteors in your space. They float in the air and orbit you for the duration. When you cast the spell—and once on on each of your turns thereafter as an action—you can expend a meteor, sending it streaking toward a point within 20 meters. Once a meteor reaches its destination or impacts against a solid surface, the meteor explodes. Each creature within 1 meter of that point must make a Reflex saving throw.
On a failure, it takes 2d6 concussion damage and 2d6 fire damage and is burning 2.
On a critical failure, it takes twice as much damage and is burning 4.
On a success, it takes half as much damage and is burning 1.
On a critical success, it takes no damage.
You can increase the number of meteors by 2, the concussion damage by 1d6, the fire damage by 1d6, and the burning level by 1 for each additional mana expended.