As two actions, 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. The plume spreads around corners. Each creature in a sphere centered on that point must make a Fortitude saving throw.

On a failure, it takes 5d6 poison damage and is poisoned for the duration.

On a critical failure, it takes twice as much damage.

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 2d6 for each additional catalyst expended.