As an action, you can create this vial. 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 cold damage and is slowed 1 until the end of its next turn.

On a critical failure, it takes twice as much damage and is slowed 2 until the end of its next turn.

On a success, it takes half as much damage.

On a critical success, it takes no damage.

Augment
You can augment this concoction with the following options, expending catalysts for each option.
  • 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.