As an action, you can create this bomb. As an action, a creature can throw this bomb at a point within 9 meters, where it explodes on impact. Each creature in a sphere centered on that point must make a Reflex saving throw.
On a failed save, a creature takes 2d6 concussion damage and 2d6 fire damage.
On a successful save, it takes half as much damage.
You can increase the fire damage by 1d6 and the concussion damage by 2d6 for each additional catalyst expended.