unstable, 1 minute/catalyst
As two actions, you can create this vial of slowly swirling neon blue gas. 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 takes 3d8 poison damage, is poisoned, and is slowed 1 for the duration.
On a critical failure, it takes twice as much damage and is slowed 2 for the duration.
On a success, it takes half as much damage.
On a critical success, it takes no damage.
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 damage by 1d8 for each additional catalyst expended.
You can expend 1 additional catalyst to increase the slowed level by 1.