As an action, you can create a vial of light green liquid. As an action, a creature can throw the vial at a point within 5 meters, shattering it on impact. Each creature in a sphere centered on that point must make a Fortitude saving throw.

On a failure, it is slowed 1 for the duration.

On a critical failure, it is slowed 2 for the duration.

A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Augment

You can increase the slowed level by 1 for each additional catalyst expended.