unstable, 5 minutes/catalyst

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. A cloud of poisonous, yellow-green fog spreads to fill a sphere for the duration. The sphere spreads around corners, and its area is heavily obscured. It lasts for the duration or until a wind of moderate or greater speed (at least 15 kilometers per hour) disperses it.

A creature that enters the spell’s area for the first time on a turn or starts its turn there must make a Fortitude saving throw.

On a failure, it takes 2d8 poison damage and is poisoned until the end of its next turn.

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.

Creatures are affected even if they hold their breath or don’t need to breathe.

Augment
You can augment this concoction with the following options, expending catalysts for each option.
  • You can increase the damage by 1d8 for every two additional catalyst expended.

  • You can expend 1 additional catalyst so duration changes to 1 hour/catalyst.