As an action, you can create this bomb. As an action, a creature can throw this bomb at a point within 5 meters, where it explodes on impact. Each creature in a sphere centered on that point must make a Reflex saving throw.
On a failure, it takes 1d6 concussion damage and 2d6 fire damage and is burning 1.
On a critical failure, it takes twice as much damage and is burning 2.
On a success, it takes half as much damage and is burning half as much.
On a critical success, it takes no damage.
You can increase the fire damage by 1d6 and the burning level by 1 for each additional catalyst expended.